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/*
space.c:
Copyright (C) 1998 Richard Karpen
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
*/
/******************************************/
/* The applications in this file were */
/* designed and coded by Richard Karpen */
/* University of Washington, Seattle 1998 */
/******************************************/
#include "stdopcod.h"
#include "space.h"
#include <math.h>
#define RESOLUTION 100
static int32_t spaceset(CSOUND *csound, SPACE *p)
{
STDOPCOD_GLOBALS *pp;
FUNC *ftp = NULL;
if (*p->ifn > 0) {
if (UNLIKELY((ftp = csound->FTnp2Finde(csound, p->ifn)) == NULL))
return NOTOK;
p->ftp = ftp;
}
if (p->auxch.auxp == NULL ||
p->auxch.size<sizeof(MYFLT)*(CS_KSMPS * 4)) {
MYFLT *fltp;
csound->AuxAlloc(csound, (size_t) (CS_KSMPS * 4)
* sizeof(MYFLT), &p->auxch);
fltp = (MYFLT *) p->auxch.auxp;
p->rrev1 = fltp; fltp += CS_KSMPS;
p->rrev2 = fltp; fltp += CS_KSMPS;
p->rrev3 = fltp; fltp += CS_KSMPS;
p->rrev4 = fltp; //fltp += CS_KSMPS;
}
pp = (STDOPCOD_GLOBALS*) csound->stdOp_Env;
pp->spaceaddr = (void*) p;
return OK;
}
static int32_t space(CSOUND *csound, SPACE *p)
{
MYFLT *r1, *r2, *r3, *r4, *sigp, ch1, ch2, ch3, ch4;
MYFLT distance=FL(1.0), distr, distrsq, direct;
MYFLT *rrev1, *rrev2, *rrev3, *rrev4;
MYFLT torev, localrev, globalrev;
MYFLT xndx, yndx;
//MYFLT half_pi = FL(0.5)*PI_F;
MYFLT sqrt2 = SQRT(FL(2.0));
MYFLT fabxndx, fabyndx;
FUNC *ftp;
int32 indx, length, halflen;
MYFLT v1, v2, fract, ndx;
uint32_t offset = p->h.insdshead->ksmps_offset;
uint32_t early = p->h.insdshead->ksmps_no_end;
uint32_t n, nsmps = CS_KSMPS;
MYFLT revb = *p->reverbamount;
if (*p->ifn > 0) { /* get xy vals from function table */
if (UNLIKELY((ftp = p->ftp) == NULL)) goto err1;
ndx = *p->time * RESOLUTION; /* when data is res. frames/second */
length = ftp->flen;
halflen = (int32)(length * FL(0.5));
indx = (int32) floor(ndx);
fract = ndx - indx;
if (ndx > (halflen-1)) {
indx = halflen - 1;
fract = FL(0.0);
}
else if (ndx < 0) {
indx = 0L;
fract = FL(0.0);
}
v1 = *(ftp->ftable + (indx*2));
v2 = *(ftp->ftable + (indx*2) + 2);
xndx = v1 + (v2 - v1) * fract;
v1 = *(ftp->ftable + (indx*2) + 1);
v2 = *(ftp->ftable + (indx*2) + 3);
yndx = v1 + (v2 - v1) * fract;
}
else { /* get xy vals from input arguments */
xndx = *p->kx;
yndx = *p->ky;
}
distance = HYPOT(xndx, yndx);
fabxndx = FABS(xndx);
fabyndx = FABS(yndx);
if ((fabxndx > FL(1.0)) || (fabyndx > FL(1.0))) {
if (fabxndx > fabyndx) {
xndx = xndx/fabxndx;
yndx = yndx/fabxndx;
/* distance = fabxndx; */
}
else {
xndx = xndx/fabyndx;
yndx = yndx/fabyndx;
/* distance = fabyndx; */
}
}
if (UNLIKELY(distance < FL(1.0))) distance = FL(1.0);
distr=(FL(1.0) / distance);
distrsq = FL(1.0)/SQRT(distance);
xndx = (xndx+FL(1.0))*FL(0.5);
yndx = (yndx+FL(1.0))*FL(0.5);
ch2 = SIN(HALFPI_F * xndx) * SIN(HALFPI_F * yndx) * sqrt2;
ch4 = SIN(HALFPI_F * xndx) * SIN(HALFPI_F * (FL(1.0)-yndx)) * sqrt2;
ch1 = SIN(HALFPI_F * (FL(1.0)-xndx)) * SIN(HALFPI_F * yndx) * sqrt2;
ch3 = SIN(HALFPI_F * (FL(1.0)-xndx)) * SIN(HALFPI_F * (FL(1.0)-yndx)) * sqrt2;
r1 = p->r1;
r2 = p->r2;
r3 = p->r3;
r4 = p->r4;
rrev1 = p->rrev1;
rrev2 = p->rrev2;
rrev3 = p->rrev3;
rrev4 = p->rrev4;
sigp = p->asig;
if (UNLIKELY(offset)) {
memset(r1, '\0', offset*sizeof(MYFLT));
memset(r2, '\0', offset*sizeof(MYFLT));
memset(r3, '\0', offset*sizeof(MYFLT));
memset(r4, '\0', offset*sizeof(MYFLT));
}
if (UNLIKELY(early)) {
nsmps -= early;
memset(&r1[nsmps], '\0', early*sizeof(MYFLT));
memset(&r2[nsmps], '\0', early*sizeof(MYFLT));
memset(&r3[nsmps], '\0', early*sizeof(MYFLT));
memset(&r4[nsmps], '\0', early*sizeof(MYFLT));
}
for (n=offset; n<nsmps; n++) {
direct = sigp[n] * distr;
torev = sigp[n] * distrsq * revb;
globalrev = torev * distr;
localrev = torev * (FL(1.0) - distr);
r1[n] = direct * ch1;
r2[n] = direct * ch2;
r3[n] = direct * ch3;
r4[n] = direct * ch4;
rrev1[n] = (localrev * ch1) + globalrev;
rrev2[n] = (localrev * ch2) + globalrev;
rrev3[n] = (localrev * ch3) + globalrev;
rrev4[n] = (localrev * ch4) + globalrev;
}
return OK;
err1:
return csound->PerfError(csound, &(p->h),
Str("space: not initialised"));
}
static int32_t spsendset(CSOUND *csound, SPSEND *p)
{
STDOPCOD_GLOBALS *pp;
pp = (STDOPCOD_GLOBALS*) csound->stdOp_Env;
p->space = (SPACE*) pp->spaceaddr;
return OK;
}
static int32_t spsend(CSOUND *csound, SPSEND *p)
{
IGN(csound);
SPACE *q = p->space;
int32_t nbytes = CS_KSMPS*sizeof(MYFLT);
memmove(p->r1, q->rrev1, nbytes);
memmove(p->r2, q->rrev2, nbytes);
memmove(p->r3, q->rrev3, nbytes);
memmove(p->r4, q->rrev4, nbytes);
return OK;
}
static int32_t spdistset(CSOUND *csound, SPDIST *p)
{
FUNC *ftp;
if (*p->ifn > 0) {
if (UNLIKELY((ftp = csound->FTnp2Finde(csound, p->ifn)) == NULL))
return NOTOK;
p->ftp = ftp;
}
return OK;
}
static int32_t spdist(CSOUND *csound, SPDIST *p)
{
MYFLT *r;
MYFLT distance, xndx, yndx;
FUNC *ftp;
int32 indx, length, halflen;
MYFLT v1, v2, fract, ndx;
r = p->r;
if (*p->ifn > 0) {
if (UNLIKELY((ftp = p->ftp)==NULL)) goto err1;
ndx = *p->time * RESOLUTION; /* when data is 10 frames/second */
length = ftp->flen;
halflen = (int32)(length * FL(0.5));
indx = (int32) floor(ndx);
fract = ndx - indx;
if (ndx > (halflen-1)) {
indx = halflen - 1;
fract = FL(0.0);
}
else if (ndx < 0) {
indx = 0L;
fract = FL(0.0);
}
v1 = *(ftp->ftable + (indx+indx));
v2 = *(ftp->ftable + (indx+indx) + 2);
xndx = v1 + (v2 - v1) * fract;
v1 = *(ftp->ftable + (indx+indx) + 1);
v2 = *(ftp->ftable + (indx+indx) + 3);
yndx = v1 + (v2 - v1) * fract;
}
else { /* get xy vals from input arguments */
xndx = *p->kx;
yndx = *p->ky;
}
distance = HYPOT(xndx,yndx);
if (distance < FL(1.0)) distance = FL(1.0);
*r=distance;
return OK;
err1:
return csound->PerfError(csound, &(p->h),
Str("spdist: not initialised"));
}
#define S(x) sizeof(x)
static OENTRY localops[] =
{
{ "space", S(SPACE), TR,3, "aaaa", "aikkkk",(SUBR)spaceset, (SUBR)space },
{ "spsend", S(SPSEND), 0,3, "aaaa", "", (SUBR)spsendset, (SUBR)spsend },
{ "spdist", S(SPDIST), 0,3, "k", "ikkk", (SUBR)spdistset, (SUBR)spdist }
};
int32_t space_init_(CSOUND *csound)
{
return csound->AppendOpcodes(csound, &(localops[0]),
(int32_t
) (sizeof(localops) / sizeof(OENTRY)));
}
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