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/*
ftest.c:
Copyright (C) 2004,2008 John ffitch, Victor Lazzarini
2012 Gleb Rogozinsky
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 "csdl.h"
#include "csoundCore.h"
#include <math.h>
static int32_t tanhtable(FGDATA *ff, FUNC *ftp)
{
CSOUND *csound =ff->csound;
MYFLT *fp = ftp->ftable;
MYFLT start = ff->e.p[5];
MYFLT end = ff->e.p[6];
MYFLT resc = ff->e.p[7];
if (ftp->flen <= 0) return csound->ftError(ff, Str("Illegal zero table size"));
MYFLT step = (end - start) / (MYFLT) ftp->flen;
MYFLT x;
int32_t i;
for (i = 0, x = start; i <= (int32_t) ftp->flen; i++, x += step)
fp[i] = TANH(x);
if (resc!=FL(0.0)) ff->e.p[4] *= -1;
/*else ff->e.p[4] = 1;*/
return OK;
}
static int32_t exptable(FGDATA *ff, FUNC *ftp)
{
CSOUND *csound = ff->csound;
MYFLT *fp = ftp->ftable;
MYFLT start = ff->e.p[5];
MYFLT end = ff->e.p[6];
MYFLT resc = ff->e.p[7];
if (ftp->flen <= 0) return csound->ftError(ff, Str("Illegal zero table size"));
MYFLT step = (end - start) / (MYFLT) ftp->flen;
MYFLT x;
int32_t i;
for (i = 0, x = start; i <= (int32_t) ftp->flen; i++, x += step)
fp[i] = EXP(x);
if (resc!=FL(0.0)) ff->e.p[4] *= -1;
/*else ff->e.p[4] = 1;*/
return OK;
}
/* Translation table from perceived to actual amplitude */
static int32_t sonetable(FGDATA *ff, FUNC *ftp)
{
CSOUND *csound = ff->csound;
MYFLT *fp = ftp->ftable;
MYFLT start = ff->e.p[5];
MYFLT end = ff->e.p[6];
MYFLT eqlp = ff->e.p[7];
MYFLT resc = ff->e.p[8];
if (ftp->flen <= 0) return csound->ftError(ff, Str("Illegal zero table size"));
MYFLT step = (end - start) / (MYFLT) ftp->flen;
MYFLT x;
int32_t i;
if (eqlp==FL(0.0)) eqlp = FL(0.001);
/* printf("Sone: %f %f %f %f\n",
ff->e.p[5], ff->e.p[6], ff->e.p[7], ff->e.p[8]); */
for (i = 0, x = start; i <= (int32_t) ftp->flen; i++, x += step) {
fp[i] = x*POWER(x/eqlp, FL(33.0)/FL(78.0));
//printf("%f -> %f\n", x, fp[i]);
}
if (resc!=FL(0.0)) ff->e.p[4] *= -1;
/*else ff->e.p[4] = 1;*/
return OK;
}
/* GENwave by Gleb Rogozinsky 2012 */
typedef struct {
MYFLT *pWF, *pSF;
MYFLT *pFil[2];
uint32_t *size;
} WAVELET;
static int32_t deconvolve(MYFLT *pInp, WAVELET *pwaveS, uint32_t *pnewLen,
MYFLT *pBuf, int32_t *pOrder)
{
uint32_t i, j;
*pnewLen *= 2;
for (j = 0; j < *pnewLen; j++) {
for (i = 0; i < *pwaveS->size; i++)
pBuf[(2*j+i) % *pnewLen] += pInp[j]*pwaveS->pFil[*pOrder][i];
}
for (i = 0; i < *pnewLen; i++) {
pInp[i] = pBuf[i];
pBuf[i] = FL(0.0);
}
return OK;
}
static int32_t wavetable(FGDATA *ff, FUNC *ftp)
{
CSOUND *csound = ff->csound;
MYFLT *fp = ftp->ftable;
MYFLT *fp_filter, *pInp, *pBuf;
MYFLT order = ff->e.p[6];
MYFLT resc = ff->e.p[7];
int32_t ffilno = (int32_t)ff->e.p[5];
uint32_t i;
uint32_t steps, newLen, *pnewLen;
int32_t nargs = ff->e.pcnt - 4;
int32_t *pOrder, *xfree;
FUNC *srcfil;
MYFLT *mirr;
WAVELET wave, *pwaveS;
if (ftp->flen <= 0)
return csound->ftError(ff, Str("Illegal zero table size %d"));
if (ffilno >csound->maxfnum || csound->flist[ffilno]==NULL)
return csound->InitError(csound, Str("ftable number does not exist\n"));
srcfil = csound->flist[ffilno];
if (UNLIKELY(nargs < 3))
csound->Warning(csound, Str("insufficient arguments"));
fp_filter = srcfil->ftable;
newLen = srcfil->flen;
mirr = (MYFLT*) csound->Malloc(csound, sizeof(MYFLT)*srcfil->flen);
pnewLen = &newLen;
pwaveS = &wave;
pwaveS->pSF = fp_filter;
pwaveS->size = &srcfil->flen;
pwaveS->pWF = mirr;
/* create QMF */
for (i = 0; i < srcfil->flen; i++)
pwaveS->pWF[i] = POWER(FL(-1.0),i)*pwaveS->pSF[srcfil->flen-1-i];
pwaveS->pFil[0] = pwaveS->pSF;
pwaveS->pFil[1] = pwaveS->pWF;
pInp = (MYFLT*) csound->Calloc(csound, ftp->flen* sizeof(MYFLT));
pBuf = (MYFLT*) csound->Calloc(csound, ftp->flen* sizeof(MYFLT));
*pInp = FL(1.0);
steps = (int32_t)LOG2(ftp->flen/srcfil->flen);
xfree = pOrder = (int32_t*)csound->Malloc(csound, sizeof(int32_t)*steps);
/* DEC to BIN */
for (i = 0; i < steps; i++)
pOrder[i] = ((int32_t
)order>>i) & 0x1;
/* main loop */
for (i = 0; i < steps; i++)
deconvolve(pInp, pwaveS, pnewLen, pBuf, pOrder++);
for (i = 0; i < *pnewLen; i++)
fp[i] = pInp[i];
csound->Free(csound,pBuf); csound->Free(csound,pInp);
csound->Free(csound,xfree); csound->Free(csound,mirr);
if (resc!=FL(0.0)) ff->e.p[4] *= -1;
/*else ff->e.p[4] = 1;*/
return OK;
}
static NGFENS ftest_fgens[] = {
{ "tanh", tanhtable },
{ "exp", exptable },
{ "sone", sonetable },
{ "wave", wavetable },
{ NULL, NULL }
};
FLINKAGE_BUILTIN(ftest_fgens)
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