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#include "m_pd.h"
#ifndef NT
#include <sys/mman.h>
#endif
#include <sys/types.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
/* ------------------------ piperead_tilde~ ----------------------------- */
#ifdef NT
#define BINREADMODE "rb"
#else
#define BINREADMODE "r"
#endif
static t_class *piperead_tilde_class;
typedef struct _piperead_tilde
{
t_object x_obj;
void* x_mapaddr;
int x_fd;
short x_sample;
t_int x_play;
t_int x_channels;
int buflen;
short buf[32768];
int readpointer;
int writepointer;
} t_piperead_tilde;
void piperead_tilde_open(t_piperead_tilde *x,t_symbol *filename)
{
/* struct stat fstate;*/
char fname[MAXPDSTRING];
canvas_makefilename(canvas_getcurrent(), filename->s_name,
fname, MAXPDSTRING);
/* close the old file */
if (x->x_fd >= 0) close(x->x_fd);
if ((x->x_fd = open(fname,( O_NONBLOCK | O_RDONLY))) < 0)
{
error("can't open %s",fname);
return;
}
for (x->writepointer=0;x->writepointer<(x->buflen*0.9);x->writepointer++){
read (x->x_fd,&x->buf[x->writepointer],2);
}
/* post ("prebuffering done");*/
}
#define MAX_CHANS 4
t_int *piperead_tilde_perform(t_int *w)
{
t_piperead_tilde* x = (t_piperead_tilde*)(w[1]);
int c = x->x_channels;
int i;
int erg=0;
int n;
t_float* out[MAX_CHANS];
for (i=0;i<c;i++)
out[i] = (t_float *)(w[3+i]);
n = (int)(w[3+c]);
while (n--)
if (x->x_play){
for (i=0;i<c;i++)
{
if (++x->readpointer>x->buflen){
x->readpointer=0;
}
if (erg != EAGAIN){
if (++x->writepointer>x->buflen){
x->writepointer=0;
}
}
*out[i]++ = x->buf[x->readpointer]/32768.;
erg = read (x->x_fd,&x->buf[x->writepointer],2);
}
}
else
{
for (i=0;i<c;i++) *out[i]++= 0.;
}
return (w+c+4);
}
static void piperead_tilde_float(t_piperead_tilde *x, t_floatarg f)
{
int t = f;
if (t) {
x->x_play=1;
}
else {
x->x_play=0;
}
}
static void piperead_tilde_dsp(t_piperead_tilde *x, t_signal **sp)
{
switch (x->x_channels) {
case 1:
dsp_add(piperead_tilde_perform, 4, x, sp[0]->s_vec,
sp[1]->s_vec, sp[0]->s_n);
break;
case 2:
dsp_add(piperead_tilde_perform, 5, x, sp[0]->s_vec,
sp[1]->s_vec,sp[2]->s_vec, sp[0]->s_n);
break;
case 4:
dsp_add(piperead_tilde_perform, 6, x, sp[0]->s_vec,
sp[1]->s_vec,sp[2]->s_vec,
sp[3]->s_vec,sp[4]->s_vec,
sp[0]->s_n);
break;
}
}
static void *piperead_tilde_new(t_floatarg chan, t_floatarg buflen)
{
t_piperead_tilde *x = (t_piperead_tilde *)pd_new(piperead_tilde_class);
t_int c = chan;
t_int bl = buflen;
if (c<1 || c > MAX_CHANS) c = 1;
if (bl<8 || bl > 32767) bl = 256;
x->x_fd = -1;
x->x_channels = c;
x->buflen=bl;
x->x_play = 0;
while (c--) {
outlet_new(&x->x_obj, gensym("signal"));
}
return (x);
}
void piperead_tilde_setup(void)
{
piperead_tilde_class = class_new(gensym("piperead~"), (t_newmethod)piperead_tilde_new, 0,
sizeof(t_piperead_tilde), 0,A_DEFFLOAT,A_DEFFLOAT,0);
class_addmethod(piperead_tilde_class, nullfn, gensym("signal"), 0);
class_sethelpsymbol(piperead_tilde_class, gensym("pipeio~"));
class_addmethod(piperead_tilde_class, (t_method) piperead_tilde_dsp, gensym("dsp"), 0);
class_addmethod(piperead_tilde_class, (t_method) piperead_tilde_open, gensym("open"), A_SYMBOL,A_NULL);
class_addfloat(piperead_tilde_class, piperead_tilde_float);
}
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