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/*
* Pure Data Packet module.
* Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
*
* 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.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "pdp.h"
typedef struct pdp_del_struct
{
t_object x_obj;
t_float x_f;
t_outlet *x_outlet0;
int *x_packet;
int x_order;
int x_head;
int x_delay;
} t_pdp_del;
static void pdp_del_input_0(t_pdp_del *x, t_symbol *s, t_floatarg f)
{
int in;
int out;
int packet;
/* if this is a register_ro message or register_rw message, register with packet factory */
/* if this is a process message, start the processing + propagate stuff to outputs */
if (s == gensym("register_ro")){
in = (x->x_head & (x->x_order-1));
//post("pdp_del: marking unused packed id=%d on loc %d", x->x_packet[0], in);
pdp_packet_mark_unused(x->x_packet[in]);
packet = pdp_packet_copy_ro((int)f);
x->x_packet[in] = packet;
//post("pdp_del: writing packed id=%d on loc %d", packet, in);
}
else if (s == gensym("process")){
out = ((x->x_head + x->x_delay) & (x->x_order-1));
packet = x->x_packet[out];
if (-1 != packet){
//post("pdp_del: packet %d has id %d", out, packet);
pdp_packet_mark_unused(packet);
outlet_pdp(x->x_outlet0, packet);
x->x_packet[out] = -1;
}
else {
//post("pdp_del: packet %d is empty", out);
}
x->x_head--;
}
}
static void pdp_del_delay(t_pdp_del *x, t_floatarg fdel)
{
int del = (int)fdel;
if (del < 0) del = 0;
if (del >= x->x_order) del = x->x_order - 1;
x->x_delay = del;
}
static void pdp_del_reset(t_pdp_del *x)
{
int i;
for (i=0; i<x->x_order; i++) {
pdp_packet_mark_unused(x->x_packet[i]);
x->x_packet[i] = -1;
}
x->x_head = 0;
}
static void pdp_del_free(t_pdp_del *x)
{
pdp_del_reset(x);
free (x->x_packet);
}
t_class *pdp_del_class;
void *pdp_del_new(t_floatarg forder, t_floatarg fdel)
{
int order = (int)forder;
int del;
int logorder;
int i;
t_pdp_del *x = (t_pdp_del *)pd_new(pdp_del_class);
del = order;
order++;
if (del < 0) del = 0;
if (order <= 2) order = 2;
else {
order--;
logorder = 1;
while ((order | 1) != 1) {
order >>= 1;
logorder++;
}
order = 1 << logorder;
}
post("pdp_del: order = %d", order);
x->x_order = order;
x->x_packet = (int *)malloc(sizeof(int)*order);
for(i=0; i<order; i++) x->x_packet[i] = -1;
x->x_delay = del;
inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("delay"));
x->x_outlet0 = outlet_new(&x->x_obj, &s_anything);
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_del_setup(void)
{
pdp_del_class = class_new(gensym("pdp_del"), (t_newmethod)pdp_del_new,
(t_method)pdp_del_free, sizeof(t_pdp_del), 0, A_DEFFLOAT, A_NULL);
class_addmethod(pdp_del_class, (t_method)pdp_del_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
class_addmethod(pdp_del_class, (t_method)pdp_del_delay, gensym("delay"), A_DEFFLOAT, A_NULL);
class_addmethod(pdp_del_class, (t_method)pdp_del_reset, gensym("reset"), A_NULL);
}
#ifdef __cplusplus
}
#endif
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