they compile, but don't work quite yet

svn path=/trunk/externals/hcs/; revision=536

1 files changed, 185 insertions, 0 deletions

diff --git a/rawjoystick.c b/rawjoystick.c
new file mode 100644
index 0000000..73dce1e
--- /dev/null
+++ b/rawjoystick.c
@@ -0,0 +1,185 @@
+/*
+'pd_joystick' (An external library for Miller Puckette's 'PD' software
+adding PC and/or USB joystick control capabilities)
+
+Copyright (C) 2001 Joseph A. Sarlo
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library 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
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  
+
+jsarlo@peabody.jhu.edu
+*/
+
+#include "m_pd.h"
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#ifdef USB
+#define JOYSTICK_DEVICE   "/dev/input/js0"
+#else
+#define JOYSTICK_DEVICE   "dev/js0"
+#endif
+
+// scaling factor for output
+#define DEF_SCALE         1
+// delay/refresh time in milliseconds
+#define DEF_DELTIME       5
+// this object handles a maximum of 10 axes
+#define MAX_AXIS_OUTS     10
+// input event types
+#define JS_EVENT_BUTTON   0x01
+#define JS_EVENT_AXIS     0x02
+#define JS_EVENT_INIT     0x80
+
+// ise ioctl() to get number of axes and buttons from device
+#define JSIOCGAXES       _IOR('j', 0x11, unsigned char)
+#define JSIOCGBUTTONS    _IOR('j', 0x12, unsigned char)
+
+struct js_event
+{
+    unsigned int time;
+    signed short value;
+    unsigned char type;
+    unsigned char number;
+};
+
+typedef struct _joystick
+{
+    t_object t_ob;
+    struct js_event x_joy_e;
+    int x_joy_fd;
+    float x_scale;
+    float x_translation;
+    t_outlet *x_axis_out[10];
+    t_outlet *x_button_num_out;
+    t_outlet *x_button_val_out;
+    t_clock *x_clock;
+    double x_deltime;
+    unsigned char x_joy_buttons;
+    unsigned char x_joy_axes;
+}t_joystick;
+
+t_class *joystick_class;
+
+void *joystick_new(t_float deltime, t_float scale, t_float translation); 
+void joystick_setup(void);
+void joystick_read(t_joystick *x);
+void joystick_change_deltime(t_joystick *x, t_float deltime);
+void joystick_free(t_joystick *x);
+
+void *joystick_new(t_float deltime, t_float scale, t_float translation)
+{  
+    int i, num_axes;   
+     
+    t_joystick *x = (t_joystick *)pd_new(joystick_class);
+
+    // open the joystick device read-only, non-exclusive
+    x->x_joy_fd = open (JOYSTICK_DEVICE, O_RDONLY | O_NONBLOCK);
+
+    // read js_events from the JOYSTICK_DEVICE stream
+    while (read (x->x_joy_fd, &(x->x_joy_e), sizeof(struct js_event)) > -1);
+
+    // if deltime is set in the object's creation arguments
+    // use that value, otherwise use the default
+    if (deltime == 0)
+      x->x_deltime = DEF_DELTIME;
+    else
+      x->x_deltime = (int)deltime;
+
+    // if scale is set in the object's creation arguments
+    // use that value, otherwise use the default
+    if (scale == 0)
+      x->x_scale = DEF_SCALE;
+    else
+      x->x_scale = scale;
+    
+    // get translation from object arguments
+    x->x_translation = translation;
+    x->x_joy_axes = 0;
+    x->x_joy_buttons = 0;
+
+    // get number of axes and buttons from device
+    ioctl (x->x_joy_fd, JSIOCGAXES, &(x->x_joy_axes));
+    ioctl (x->x_joy_fd, JSIOCGBUTTONS, &(x->x_joy_buttons));
+
+    // this object handles a maximum of MAX_AXIS_OUTS axes
+    // if there are more, limit to MAX_AXIS_OUTS
+    if (x->x_joy_axes > MAX_AXIS_OUTS)
+    	num_axes = MAX_AXIS_OUTS;
+    else
+        num_axes = x->x_joy_axes;
+
+    // create outlets for each axis
+    for (i = 0; i < num_axes; i++)
+        x->x_axis_out[i] = outlet_new(&x->t_ob, &s_float);
+
+    // create outlets for buttons
+    x->x_button_num_out = outlet_new(&x->t_ob, &s_float);
+    x->x_button_val_out = outlet_new(&x->t_ob, &s_float);
+
+
+    x->x_clock = clock_new (x, (t_method)joystick_read);
+
+    clock_delay (x->x_clock, x->x_deltime);
+
+    post ("configuring joystick:");
+    post ("  found %d axes", x->x_joy_axes);
+    post ("  found %d buttons", x->x_joy_buttons);
+    return (void *)x;
+}
+
+void joystick_setup(void)
+{
+    post ("joystick object loaded (J. Sarlo)");
+    joystick_class = class_new(gensym("joystick"),(t_newmethod)joystick_new, 
+                              (t_method)joystick_free, sizeof(t_joystick), 0, A_DEFFLOAT, A_DEFFLOAT, 
+                               A_DEFFLOAT, 0);
+    class_addfloat(joystick_class, joystick_change_deltime);
+}
+
+void joystick_read(t_joystick *x)
+{
+ 	int rt;
+    while (read (x->x_joy_fd, &(x->x_joy_e), sizeof(struct js_event)) > -1)
+    {
+       if (x->x_joy_e.type == JS_EVENT_AXIS)
+       {
+            outlet_float (x->x_axis_out[x->x_joy_e.number], 
+                          ((int)x->x_joy_e.value + x->x_translation) / x->x_scale);
+       }
+       else if (x->x_joy_e.type == JS_EVENT_BUTTON)
+            {
+                outlet_float (x->x_button_val_out, x->x_joy_e.value);
+                outlet_float (x->x_button_num_out, x->x_joy_e.number);
+            }
+    }
+    clock_delay (x->x_clock, x->x_deltime);
+}
+
+void joystick_change_deltime(t_joystick *x, t_float deltime)
+{
+    if (deltime < 0)
+        deltime = 0;
+    x->x_deltime = deltime;
+}
+
+void joystick_free(t_joystick *x)
+{
+    close (x->x_joy_fd);
+    clock_free (x->x_clock);
+}