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/******************************************************
*
* dmxin - implementation file
*
* copyleft (c) IOhannes m zmölnig
*
* 0603:forum::für::umläute:2008
*
* institute of electronic music and acoustics (iem)
*
******************************************************
*
* license: GNU General Public License v.2
*
******************************************************/
#include "dmx4pd.h"
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
static t_class *dmxin_class;
typedef struct _dmxin
{
t_object x_obj;
int x_device;
int x_port;
dmx_t x_dmxbuffer[512];
t_outlet*x_outlet1, *x_outlet2;
} t_dmxin;
static void dmx_doread(t_dmxin*x) {
int dmxin=x->x_device;
fd_set readset;
post("dmxin_doread: %d", dmxin);
if(dmxin<=0)return;
FD_ZERO(&readset);
FD_SET(dmxin, &readset);
FD_SET(0, &readset);
int n=select(dmxin+1, &readset, NULL,NULL, NULL);
if(n>0 && FD_ISSET(dmxin, &readset)) {
dmx_t dmxbuffer[512];
int i=0;
lseek (dmxin, 0, SEEK_SET);
n=read (dmxin, dmxbuffer, sizeof(dmxbuffer));
for(i=0; i<512; i+=2) {
int c=dmxbuffer[i];
if(c!=x->x_dmxbuffer[i]) {
x->x_dmxbuffer[i]=c;
post("read %03d @ %03d", c, i);
}
}
}
}
static void dmxin_bang(t_dmxin*x)
{
dmx_doread(x);
}
static void dmxin_close(t_dmxin*x)
{
if(x->x_device>=0) {
close(x->x_device);
}
x->x_device=-1;
}
static void dmxin_open(t_dmxin*x, t_symbol*s_devname)
{
int argc=2;
const char *args[2] = {"--dmxin", s_devname->s_name};
const char**argv=args;
char*devname="";
int fd;
if(s_devname && s_devname->s_name)
devname=s_devname->s_name;
// strncpy(args[0], "--dmx", MAXPDSTRING);
// strncpy(args[1], devname, MAXPDSTRING);
fd = open (DMXINdev(&argc, argv), O_RDONLY);
if(fd!=-1) {
dmxin_close(x);
x->x_device=fd;
}
}
static void *dmxin_new(void)
{
int i=0;
t_dmxin *x = (t_dmxin *)pd_new(dmxin_class);
x->x_device=0;
x->x_port=0;
for(i=0; i<sizeof(x->x_dmxbuffer); i++) {
x->x_dmxbuffer[i]=0;
}
x->x_outlet1=outlet_new(&x->x_obj, &s_float);
x->x_outlet2=outlet_new(&x->x_obj, &s_float);
dmxin_open(x, gensym(""));
return (x);
}
static void dmxin_free(t_dmxin*x)
{
dmxin_close(x);
}
void dmxin_setup(void)
{
dmxin_class = class_new(gensym("dmxin"), (t_newmethod)dmxin_new, (t_method)dmxin_free,
sizeof(t_dmxin),
0,
A_NULL);
class_addbang(dmxin_class, dmxin_bang);
#ifdef DMX4PD_POSTBANNER
DMX4PD_POSTBANNER;
#endif
}
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