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//#include "commonget~.h"
#include "m_pd.h"
typedef struct _common {
t_symbol* name;
t_sample a[64];
t_sample b[64];
t_sample* w;
t_sample* r;
//int writers;
//int written;
int users;
struct _common* next;
struct _common* previous;
t_clock* clock;
int armed;
} t_common;
static t_common* common;
// This should be triggered by the clock
static void common_swap(t_common* pg) {
//post("clock");
t_sample* temp = pg->r;
pg->r = pg->w;
pg->w = temp;
int i;
t_sample* samples = pg->w;
for (i=0;i<64;i++) {
*samples++ = 0;
}
pg->armed = 0;
//if (pg == NULL) post("ouc");
//pg->written = 0;
}
static t_common* common_register(t_symbol* name) {
t_common* new_common;
//is_writer = is_writer ? 1 : 0;
t_common* pg = common;
if ( pg != NULL) {
// Search for previous common
while( pg ) {
if ( pg->name == name) {
//#ifdef PARAMDEBUG
// post("Found put/get with same name");
//#endif
//pg->writers = pg->writers + is_writer;
pg->users = pg->users + 1;
return pg;
}
if ( pg->next == NULL ) break;
pg = pg->next;
}
}
//post("Appending new put/get");
// Append new common
new_common = getbytes(sizeof(*new_common));
new_common->name = name;
//new_common->writers = is_writer;
new_common->users = 1;
new_common->armed = 0;
new_common->clock = clock_new(new_common, (t_method)common_swap);
new_common->r = new_common->a;
new_common->w = new_common->b;
new_common->previous = pg;
if ( pg) {
pg->next = new_common;
} else {
common = new_common;
}
return new_common;
}
static void common_unregister(t_common* pg) {
//post("Trying to remove %s",pg->name->s_name);
//if ( is_writer) pg->writers = pg->writers - 1;
pg->users = pg->users - 1;
if ( pg->users <= 0) {
//post("Removing last put/get of this name");
if (pg->previous) {
pg->previous->next = pg->next;
if (pg->next) pg->next->previous = pg->previous;
} else {
common = pg->next;
if ( pg->next != NULL) pg->next->previous = NULL;
}
clock_free(pg->clock);
freebytes(pg, sizeof *(pg) );
}
}
static void common_arm(t_common* pg) {
if (!pg->armed) {
pg->armed = 1;
clock_delay(pg->clock, 0);
}
}
///////////////
// The class //
///////////////
static t_class *common_tilde_class;
typedef struct _common_tilde {
t_object x_obj;
//t_sample f_common;
t_common* pg;
t_sample f;
} t_common_tilde;
static t_int* common_tilde_perform(t_int *w)
{
t_common_tilde *x = (t_common_tilde *)(w[1]);
t_sample *in = (t_sample *)(w[2]);
t_sample *out= (t_sample *)(w[3]);
int n = (int)(w[4]);
int m;
t_sample *samples;
if ( x->pg) {
// Do adding
//if (x->pg->users > x->pg->writers) {
samples = x->pg->w;
m = n;
while (m--) {
*samples = *samples + *in;
samples++; in++;
}
//}
// Do reading
samples = x->pg->r;
m = n;
while (m--) {
*out++ = *samples++;
}
// Arm for swaping
common_arm( x->pg);
} else {
while (n--) {
*out++ = 0;
}
}
return (w+5);
}
static void common_tilde_set(t_common_tilde *x, t_symbol* s) {
if (gensym("") != s ) {
if ( x->pg ) {
if ( x->pg->name != s) {
common_unregister(x->pg);
x->pg = common_register(s);
}
} else {
x->pg = common_register(s);
}
}
}
static void common_tilde_dsp(t_common_tilde *x, t_signal **sp)
{
if ( (int) sp[0]->s_n == 64 ) {
dsp_add(common_tilde_perform, 4, x,sp[0]->s_vec,sp[1]->s_vec, sp[0]->s_n);
} else {
error("common~ only works with a block size of 64");
}
}
static void common_tilde_free( t_common_tilde *x) {
if (x->pg) common_unregister(x->pg);
}
static void *common_tilde_new(t_symbol* s)
{
t_common_tilde *x = (t_common_tilde *)pd_new(common_tilde_class);
if (gensym("") != s ) x->pg = common_register(s);
outlet_new(&x->x_obj, &s_signal);
return (void *)x;
}
void common_tilde_setup(void) {
common_tilde_class = class_new(gensym("common~"),
(t_newmethod)common_tilde_new,
(t_method)common_tilde_free, sizeof(t_common_tilde),
0, A_DEFSYM, 0);
class_addmethod(common_tilde_class,
(t_method)common_tilde_dsp, gensym("dsp"), 0);
class_addmethod(common_tilde_class,
(t_method)common_tilde_set, gensym("set"), A_SYMBOL, 0);
CLASS_MAINSIGNALIN(common_tilde_class, t_common_tilde, f);
}
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