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/*
counter.c:
Copyright (C) 2020 John ffitch
This file is part of Csound.
The Csound Library is free software; you can redistribute it
and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
Csound 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Csound; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "csoundCore.h" /* COUNTER.C */
#include "interlocks.h"
/* Structure of a counter */
typedef struct {
MYFLT val;
MYFLT max;
MYFLT min;
MYFLT inc;
int cycles;
} COUNT;
/* for create counter ocde */
typedef struct {
OPDS h;
MYFLT *res;
MYFLT *max, *min, *inc;
} CNTSET;
typedef struct {
OPDS h;
MYFLT *res;
MYFLT *icnt;
COUNT *cnt;
} COUNTER;
typedef struct {
OPDS h;
MYFLT *max, *min, *inc;
MYFLT *icnt;
COUNT *cnt;
} CNTSTATE;
/* Global structure for all counters */
typedef struct {
int max_num;
int used;
int free;
COUNT **cnts;
} CNT_GLOBALS;
/* Create a counter */
static int32_t setcnt(CSOUND *csound, CNTSET *p)
{
COUNT *y;
CNT_GLOBALS *q = (CNT_GLOBALS*)
csound->QueryGlobalVariable(csound, "counterGlobals_");
int m = 0;
if (q==NULL) {
if (UNLIKELY(csound->CreateGlobalVariable(csound, "counterGlobals_",
sizeof(CNT_GLOBALS)) != 0))
return
csound->InitError(csound, "%s",
Str("counter: failed to allocate globals"));
q = (CNT_GLOBALS*)csound->QueryGlobalVariable(csound, "counterGlobals_");
q->max_num = 10;
q->cnts = (COUNT**)csound->Calloc(csound, 10*sizeof(COUNT*));
}
if (q->free) {
int n = 0;
while (q->cnts[n]!=NULL) n++;
q->free--;
m = n;
} else {
if (q->max_num >= q->used) {
COUNT** tt = q->cnts;
tt = (COUNT**)csound->ReAlloc(csound,
tt, (q->max_num+10)*sizeof(COUNT*));
if (tt == NULL)
return csound->InitError(csound, "%s",
Str("Failed to allocate counters\n"));
q->cnts = tt;
q->max_num += 10;
}
m = q->used;
++q->used;
}
q->cnts[m] = (COUNT*)csound->Calloc(csound,sizeof(COUNT));
y = q->cnts[m];
y->val = 0;
y->min = *p->min;
y->max = *p->max;
y->inc = *p->inc;
*p->res = (MYFLT)m;
return OK;
}
COUNT* find_counter(CSOUND *csound, int n)
{
CNT_GLOBALS *q = (CNT_GLOBALS*)
csound->QueryGlobalVariable(csound, "counterGlobals_");
if (UNLIKELY(q==NULL)) return NULL;
if (n>q->max_num || n<0) return NULL;
return q->cnts[n];
}
static int32_t count_init(CSOUND *csound, COUNTER *p)
{
COUNT* q = find_counter(csound, (int)*p->icnt);
if (q==NULL) return NOTOK;
p->cnt = q;
return OK;
}
static int32_t count_init0(CSOUND *csound, COUNTER *p)
{
COUNT* q = find_counter(csound, (int)*p->res);
if (q==NULL) return NOTOK;
p->cnt = q;
return OK;
}
static int32_t count_perf(CSOUND *csound, COUNTER *p)
{
COUNT *q = p->cnt;
if (q->val > q->max) {
q->val = q->min;
q->cycles ++;
}
else if (q->val < q->min) {
q->val = q->max;
q->cycles ++;
}
*p->res = q->val;
q->val += q->inc;
return OK;
}
static int32_t count_init_perf(CSOUND *csound, COUNTER *p)
{
if (count_init(csound,p)==OK) return count_perf(csound,p);
return NOTOK;
}
static int32_t count_cycles(CSOUND *csound, COUNTER* p)
{
*p->res = p->cnt->cycles;
return OK;
}
static int32_t count_read(CSOUND *csound, COUNTER* p)
{
*p->res = p->cnt->val;
return OK;
}
static int32_t count_reset(CSOUND *csound, COUNTER* p)
{
p->cnt->val = p->cnt->min;
return OK;
}
static int32_t count_init3(CSOUND *csound, CNTSTATE *p)
{
COUNT* q = find_counter(csound, (int)*p->icnt);
if (q==NULL) return NOTOK;
p->cnt = q;
return OK;
}
static int32_t count_state(CSOUND *csound, CNTSTATE *p)
{
*p->max = p->cnt->max;
*p->min = p->cnt->min;
*p->inc = p->cnt->inc;
return OK;
}
static int32_t count_del(CSOUND *csound, COUNTER* p)
{
int n = (int)*p->icnt;
CNT_GLOBALS *q = (CNT_GLOBALS*)
csound->QueryGlobalVariable(csound, "counterGlobals_");
if (q==NULL || n>q->max_num || n<0 || q->cnts[n]==NULL) {
*p->res = -FL(1.0);
return OK;
}
csound->Free(csound, q->cnts[n]);
q->cnts[n] = NULL;
q->free++;
*p->res = (MYFLT)n;
return OK;
}
#define S(x) sizeof(x)
static OENTRY counter_localops[] = {
{ "cntCreate", S(CNTSET), 0, 1, "i", "pop", (SUBR)setcnt, NULL, NULL },
{ "count", S(COUNTER), SK, 3, "k", "o", (SUBR)count_init, (SUBR)count_perf },
{ "count_i", S(COUNTER), SK, 1, "i", "o", (SUBR)count_init_perf, NULL },
{ "cntCycles", S(COUNTER), SK, 3, "k", "o", (SUBR)count_init, (SUBR)count_cycles },
{ "cntRead", S(COUNTER), SK, 3, "k", "o", (SUBR)count_init, (SUBR)count_read },
{ "cntReset", S(COUNTER), SK, 3, "", "o", (SUBR)count_init0, (SUBR)count_reset },
{ "cntState", S(CNTSTATE), SK, 3, "kkk", "o", (SUBR)count_init3, (SUBR)count_state },
{ "cntDelete", S(COUNTER), SK, 2, "k", "k", NULL, (SUBR)count_del, NULL },
{ "cntDelete_i", S(COUNTER), SK, 1, "i", "i", (SUBR)count_del, NULL, NULL },
};
LINKAGE_BUILTIN(counter_localops)
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