diff options
Diffstat (limited to 'hid.c')
| -rw-r--r-- | hid.c | 351 |
1 files changed, 351 insertions, 0 deletions
@@ -0,0 +1,351 @@ +/* ---------------------------------------------------------------------------- */ +/* */ +/* 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. */ +/* */ +/* Based on PureData by Miller Puckette and others. */ +/* */ +/* ---------------------------------------------------------------------------- */ + + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <ctype.h> + +#ifdef __APPLE__ +#include <sys/errno.h> +#include <sysexits.h> +#include <mach/mach.h> +#include <mach/mach_error.h> +#include <IOKit/IOKitLib.h> +#include <IOKit/IOCFPlugIn.h> +#include <IOKit/hid/IOHIDLib.h> +#include <IOKit/hid/IOHIDKeys.h> +#include <IOKit/hid/IOHIDUsageTables.h> +#include <CoreFoundation/CoreFoundation.h> +#include <Carbon/Carbon.h> + +#ifndef __APPLE_CC__ +#include "Carbon_Include.h" +#endif + +#include <HID_Utilities.h> +#endif + +#include "linuxhid.h" +#include "input_arrays.h" + +static char *version = "$Revision: 1.1 $"; + +/*------------------------------------------------------------------------------ + * CLASS DEF + */ +static t_class *hid_class; + +typedef struct _hid { + 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; +#elif defined (__APPLE__) + IOHIDEventStruct 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_hid; + +/*------------------------------------------------------------------------------ + * IMPLEMENTATION + */ + +void hid_stop(t_hid* x) { + DEBUG(post("hid_stop");); + + if (x->x_fd >= 0 && x->x_started) { + clock_unset(x->x_clock); + post("hid: polling stopped"); + x->x_started = 0; + } +} + +static int hid_close(t_hid *x) { + DEBUG(post("hid_close");); + +/* just to be safe, stop it first */ + hid_stop(x); + + if (x->x_fd <0) return 0; + close (x->x_fd); + post ("[hid] closed %s",x->x_devname->s_name); + + return 1; +} + +static int hid_open(t_hid *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("hid_open");) + + hid_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("[hid] open %s failed",x->x_devname->s_name); + x->x_fd = -1; + return 0; + } + } else return 1; + + /* read input_events from the HID_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: + break; +#else + case EV_SYN: + 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 hid_read(t_hid *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); */ + } +#else defined (__APPLE__) + pRecDevice pCurrentHIDDevice = GetSetCurrentDevice (gWindow); + pRecElement pCurrentHIDElement = GetSetCurrentElement (gWindow); + + // if we have a good device and element which is not a collecion + if (pCurrentHIDDevice && pCurrentHIDElement && (pCurrentHIDElement->type != kIOHIDElementTypeCollection)) + { + SInt32 value = HIDGetElementValue (pCurrentHIDDevice, pCurrentHIDElement); + SInt32 valueCal = HIDCalibrateValue (value, pCurrentHIDElement); + SInt32 valueScale = HIDScaleValue (valueCal, pCurrentHIDElement); + } +#endif + + if (x->x_started) + { + clock_delay(x->x_clock, x->x_delay); + } + + return 1; +} + +/* Actions */ +static void hid_float(t_hid* x) { + DEBUG(post("hid_float");) + +} + +void hid_delay(t_hid* x, t_float f) { + DEBUG(post("hid_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 hid_start(t_hid* x) { + DEBUG(post("hid_start");); + + if (x->x_fd >= 0 && !x->x_started) { + clock_delay(x->x_clock, DEFAULT_DELAY); + post("hid: polling started"); + x->x_started = 1; + } else { + post("You need to set a input device (i.e /dev/input/event0)"); + } +} + +/* setup functions */ +static void hid_free(t_hid* x) { + DEBUG(post("hid_free");) + + if (x->x_fd < 0) return; + + hid_stop(x); + clock_free(x->x_clock); + close (x->x_fd); +} + +static void *hid_new(t_symbol *s) { + int i; + t_hid *x = (t_hid *)pd_new(hid_class); + + DEBUG(post("hid_new");) + + post("[hid] %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(HID_DEVICE); + + x->x_clock = clock_new(x, (t_method)hid_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 (!hid_open(x,s)) return x; + + 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),0,A_DEFSYM,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_delay,gensym("delay"),A_DEFFLOAT,0); + class_addmethod(hid_class,(t_method) hid_open,gensym("open"),A_DEFSYM,0); + class_addmethod(hid_class,(t_method) hid_close,gensym("close"),0); + class_addmethod(hid_class,(t_method) hid_start,gensym("start"),0); + class_addmethod(hid_class,(t_method) hid_start,gensym("poll"),0); + class_addmethod(hid_class,(t_method) hid_stop,gensym("stop"),0); + class_addmethod(hid_class,(t_method) hid_stop,gensym("nopoll"),0); +} + |