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/* (C) Guenter Geiger <geiger@epy.co.at> */
#include <m_pd.h>
#ifdef NT
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <signal.h>
/*
* -------------------------- pipewrite~ -------------------------------
*/
#define MAX_CHANS 4
#define BLOCKTIME 0.001
#define uint32 unsigned int
#define uint16 unsigned short
static t_class *pipewrite_class;
typedef struct _pipewrite
{
t_object x_obj;
t_symbol* filename;
int x_file;
t_int x_channels;
t_int size;
t_glist * x_glist;
t_int x_blocked;
t_int x_blockwarn;
short maxval;
} t_pipewrite;
static void pipewrite_close(t_pipewrite *x)
{
if (x->x_file > 0) {
close(x->x_file);
}
x->x_file = -1;
x->size=0;
}
static void pipewrite_open(t_pipewrite *x,t_symbol *filename)
{
char fname[MAXPDSTRING];
if (filename == &s_) {
post("pipewrite: open without filename");
return;
}
canvas_makefilename(glist_getcanvas(x->x_glist), filename->s_name,
fname, MAXPDSTRING);
x->x_blocked = 0;
x->filename = filename;
x->maxval=0;
x->size=0;
post("pipewrite: filename = %s",x->filename->s_name);
pipewrite_close(x);
if ((x->x_file = open(fname,O_WRONLY | O_NONBLOCK)) < 0)
{
error("can't open pipe %s: ",fname);
perror("system says");
return;
}
}
static void pipewrite_block(t_pipewrite *x, t_floatarg f)
{
x->x_blockwarn = f;
}
static short out[4*64];
static t_int *pipewrite_perform(t_int *w)
{
t_pipewrite* x = (t_pipewrite*)(w[1]);
t_float * in[4];
int c = x->x_channels;
int i,num,n;
short* tout = out;
int ret;
double timebefore,timeafter;
double late;
struct sigaction action;
struct sigaction oldaction;
if (x->x_file < 0) {
pipewrite_open(x,x->filename);
}
action.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &action, &oldaction);
for (i=0;i < c;i++) {
in[i] = (t_float *)(w[2+i]);
}
n = num = (int)(w[2+c]);
/* loop */
if (x->x_file >= 0) {
while (n--) {
for (i=0;i<c;i++) {
if (*(in[i]) > 1. ) { *(in[i]) = 1. ; }
if (*(in[i]) < -1. ) { *(in[i]) = -1. ; }
*tout++ = (*(in[i])++ * 32768.);
}
}
timebefore = sys_getrealtime();
if ((ret = write(x->x_file,out,sizeof(short)*num*c)) < sizeof(short)*num*c) {
post("pipewrite: short write %d",ret);
}
timeafter = sys_getrealtime();
late = timeafter - timebefore;
x->size +=ret;
/* OK, we let only 10 ms block here */
if (late > BLOCKTIME && x->x_blockwarn) {
x->x_blocked++;
if (x->x_blocked > x->x_blockwarn) {
x->x_blocked=0;
/* post("maximum blockcount %d reached",x->x_blockwarn); */
}
}
}
sigaction(SIGPIPE, &oldaction, NULL);
return (w+3+c);
}
static void pipewrite_dsp(t_pipewrite *x, t_signal **sp)
{
switch (x->x_channels) {
case 1:
dsp_add(pipewrite_perform, 3, x, sp[0]->s_vec,
sp[0]->s_n);
break;
case 2:
dsp_add(pipewrite_perform, 4, x, sp[0]->s_vec,
sp[1]->s_vec, sp[0]->s_n);
break;
case 4:
dsp_add(pipewrite_perform, 6, x, sp[0]->s_vec,
sp[1]->s_vec,
sp[2]->s_vec,
sp[3]->s_vec,
sp[0]->s_n);
break;
}
}
static void pipewrite_free(t_pipewrite* x)
{
pipewrite_close(x);
}
static void *pipewrite_new(t_symbol* name,t_floatarg chan)
{
t_pipewrite *x = (t_pipewrite *)pd_new(pipewrite_class);
t_int c = chan;
if (c<1 || c > MAX_CHANS) c = 1;
x->x_glist = (t_glist*) canvas_getcurrent();
x->x_channels = c--;
post("channels:%d",x->x_channels);
x->x_file=0;
x->x_blocked = 0;
x->x_blockwarn = 10;
while (c--) {
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
}
if (name && name != &s_) { /* start the pipe */
pipewrite_open(x,name);
}
return (x);
}
void pipewrite_tilde_setup(void)
{
pipewrite_class = class_new(gensym("pipewrite~"), (t_newmethod)pipewrite_new, (t_method)pipewrite_free,
sizeof(t_pipewrite), 0,A_DEFSYM,A_DEFFLOAT,A_NULL);
class_addmethod(pipewrite_class,nullfn,gensym("signal"), 0);
class_addmethod(pipewrite_class, (t_method) pipewrite_dsp, gensym("dsp"), 0);
class_addmethod(pipewrite_class, (t_method) pipewrite_open, gensym("open"), A_SYMBOL,A_NULL);
class_addmethod(pipewrite_class, (t_method) pipewrite_close, gensym("close"), 0);
class_addmethod(pipewrite_class, (t_method)pipewrite_block,gensym("block"),A_DEFFLOAT,0);
}
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