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[supercollider.git] / lang / LangSource / PyrSignal.cpp

/*
        SuperCollider real time audio synthesis system
    Copyright (c) 2002 James McCartney. All rights reserved.
        http://www.audiosynth.com

    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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
*/

/*
        compound formulas :
        amclip  out = B<=0 ? 0 : A*B;           // two quadrant amplitude modulation
        ring1   out = A*(B+1) = A*B + A;        // amplitude modulation of a by b.
        ring2   out = A*B + A + B;                      // ring modulation plus both original signals
        ring3   out = A*A*B;                            // ring modulation variant
        ring4   out = A*A*B - A*B*B;            // ring modulation variant
        difsqr  out = A*A - B*B;                        // difference of squares
        sumsqr  out = A*A + B*B;                        // sum of squares
        sqrdif  out = (A - B)^2                         // square of the difference = a^2 + b^2 - 2ab
        sqrsum  out = (A + B)^2                         // square of the sum        = a^2 + b^2 + 2ab
*/

#include <math.h>
#include <stdlib.h>
#include <string.h>
#include "PyrSignal.h"
#include "PyrKernel.h"
#include "SC_InlineUnaryOp.h"
#include "SC_InlineBinaryOp.h"
#include "SCBase.h"
#include "InitAlloc.h"

//double log2 ( double x );
//double hypot ( double x, double y );

float gSlopeFactor[32];
long gWrapMask[32];

float *sineCycle;
float *invSineCycle;
float *pmSineCycle;
float *gFracTable;

double phaseToSineIndex;
double sineIndexToPhase;

void signal_init_globs()
{
        int i;
        double phaseoffset, d, pmf;
        long sz, sz2;

        /* setup slopes and wrap masks */
        for (i=0; i<32; ++i) {
                long length = 1L<<i;
                gSlopeFactor[i] = 1./length;
                gWrapMask[i] = length - 1;
        }

        /* fill sine wave */
        // pyrmalloc:
        // lifetime: forever. initialized at startup.
        sineCycle    = (float*)pyr_pool_runtime->Alloc((SINESIZE+1) * sizeof(float));
        MEMFAIL(sineCycle);
        invSineCycle = (float*)pyr_pool_runtime->Alloc((SINESIZE+1) * sizeof(float));
        MEMFAIL(invSineCycle);
        pmSineCycle = (float*)pyr_pool_runtime->Alloc((SINESIZE+1) * sizeof(float));
        MEMFAIL(pmSineCycle);
        //gFracTable = (float*)pyr_pool_runtime->Alloc(FRACTABLESIZE * sizeof(float));
        //MEMFAIL(gFracTable);

        sineIndexToPhase = 2. * 3.1415926535897932384626433832795 / SINESIZE;
        phaseToSineIndex = 1. / sineIndexToPhase;
        phaseoffset = sineIndexToPhase * 0.5;
        pmf = (1L << 29) / twopi;
        for (i=0; i<=SINESIZE; ++i) {
                double phase;
                phase = i * sineIndexToPhase;
                sineCycle[i] = d = sin(phase);
                invSineCycle[i] = 1. / d;
                pmSineCycle[i] = d * pmf;
        }
        // fix 1/0 values to a special large number
        invSineCycle[0] = invSineCycle[SINESIZE/2] = invSineCycle[SINESIZE] = VERY_BIG_FLOAT;
        sz = SINESIZE;
        sz2 = sz>>1;
        for (i=1; i<=8; ++i) {
        //for (i=1; i<=0; ++i) { //ie. none
                //postfl("%d %f %f\n", i, invSineCycle[i], sineCycle[i]);
                invSineCycle[i] = invSineCycle[sz-i] = VERY_BIG_FLOAT;
                invSineCycle[sz2-i] = invSineCycle[sz2+i] = VERY_BIG_FLOAT;
        }
        /*fracscale = 1./FRACTABLESIZE;
        for (i=0; i<FRACTABLESIZE; ++i) {
                gFracTable[i] = (double)i * fracscale;
        }*/
}

PyrObject* newPyrSignal(VMGlobals *g, long size)
{
        PyrObject *signal;
        long numbytes = size * sizeof(float);
        signal = (PyrObject*)g->gc->New(numbytes, 0, obj_float, true);
        if (signal) {
                signal->classptr = class_signal;
                signal->size = size;
        }
        // note: signal is filled with garbage
        return signal;
}

/*PyrObject* newPyrSignalFrom(VMGlobals *g, PyrObject* inSignal, long size)
{
        PyrObject *signal;
        double *pslot, *qslot, *endptr;
        long set, m, mmax;
        long numbytes = size * sizeof(float);
        signal = (PyrObject*)g->gc->New(numbytes, 0, obj_float, true);
        signal->classptr = inSignal->classptr;
        signal->size = size;
        return signal;
}
*/

PyrObject* signal_fill(PyrObject *outSignal, float inValue)
{
        float *out = (float*)(outSignal->slots) - 1;
        UNROLL_CODE(outSignal->size, out, *++out = inValue;);
        return outSignal;
}

PyrObject* signal_scale(PyrObject *outSignal, float inValue)
{
        if (inValue != 1.f) {
                float *out = (float*)(outSignal->slots) - 1;
                UNROLL_CODE(outSignal->size, out, *++out *= inValue;)
        }
        return outSignal;
}

PyrObject* signal_offset(PyrObject *outSignal, float inValue)
{
        if (inValue != 0.f) {
                float *out = (float*)(outSignal->slots) - 1;
                UNROLL_CODE(outSignal->size, out, *++out += inValue;)
        }
        return outSignal;
}

PyrObject* signal_add_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP1(+);
}

PyrObject* signal_mul_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP1(*);
}

PyrObject* signal_sub_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                *++c = *++a - *++b;
        );
}

PyrObject* signal_ring1_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; *++c = *a * *++b + *a;
        );
}

PyrObject* signal_ring2_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = *a * *b + *a + *b;
        );
}

PyrObject* signal_ring3_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; *++c = *a * *a * *++b;
        );
}

PyrObject* signal_ring4_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = *a * *a * *b - *a * *b * *b;
        );
}

PyrObject* signal_thresh_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = *a < *b ? 0.f : *a;
        );
}

PyrObject* signal_amclip_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = *b <= 0.f ? 0.f : *a * *b;
        );
}

PyrObject* signal_div_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                *++c = *++a / *++b;
        );
}

PyrObject* signal_difsqr_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *c = *a * *a - *b * *b;
        );
}

PyrObject* signal_sumsqr_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *c = *a * *a + *b * *b;
        );
}

PyrObject* signal_sqrsum_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        float z;
        BINOP_LOOP2(
                z = *++a + *++b; *++c = z * z;
        );
}

PyrObject* signal_sqrdif_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        float z;
        BINOP_LOOP2(
                z = *++a - *++b; *++c = z * z;
        );
}

PyrObject* signal_absdif_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                *++c = fabs(*++a - *++b);
        );
}

PyrObject* signal_add_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        if (inb == 0.f) {
                float *a = (float*)(ina->slots);
                memcpy((float*)(outc->slots), a, ina->size * sizeof(float));
        } else {
                float *a = (float*)(ina->slots) - 1;
                float *c = (float*)(outc->slots) - 1;
                UNROLL_CODE(outc->size, c, *++c = *++a + inb;)
        }
        return outc;
}

PyrObject* signal_sub_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        if (inb == 0.f) {
                float *a = (float*)(ina->slots);
                memcpy((float*)(outc->slots), a, ina->size * sizeof(float));
        } else {
                float *a = (float*)(ina->slots) - 1;
                float *c = (float*)(outc->slots) - 1;
                UNROLL_CODE(outc->size, c, *++c = *++a - inb;)
        }
        return outc;
}

PyrObject* signal_mul_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        if (inb == 1.f) {
                float *a = (float*)(ina->slots);
                memcpy((float*)(outc->slots), a, ina->size * sizeof(float));
        } else {
                float *a = (float*)(ina->slots) - 1;
                float *c = (float*)(outc->slots) - 1;
                UNROLL_CODE(outc->size, c, *++c = *++a * inb;)
        }
        return outc;
}

PyrObject* signal_ring1_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, ++a; *++c = *a * inb + *a;)
        return outc;
}

PyrObject* signal_ring2_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, ++a; *++c = *a * inb + *a + inb;)
        return outc;
}

PyrObject* signal_ring3_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, ++a; *++c = *a * *a * inb;)
        return outc;
}

PyrObject* signal_ring4_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        float inb2 = inb * inb;
        UNROLL_CODE(outc->size, c, ++a; *++c = *a * *a * inb + *a * inb2;)
        return outc;
}


PyrObject* signal_thresh_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        float inb2 = inb * inb;
        UNROLL_CODE(outc->size, c, ++a; *++c = *a < inb2 ? 0.f : *a;)
        return outc;
}

PyrObject* signal_amclip_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *res;
        PyrObject *outc = newPyrSignal(g, ina->size);
        if (inb <= 0.f) res = signal_fill(outc, 0.f);
        else res = signal_scale(outc, inb);
        return res;
}

PyrObject* signal_div_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        if (inb == 1.f) {
                float *a = (float*)(ina->slots);
                memcpy((float*)(outc->slots), a, ina->size * sizeof(float));
        } else {
                float *a = (float*)(ina->slots) - 1;
                float *c = (float*)(outc->slots) - 1;
                inb = 1.f/inb;
                UNROLL_CODE(outc->size, c, *++c = *++a * inb;)
        }
        return outc;
}

PyrObject* signal_difsqr_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        inb = inb * inb;
        UNROLL_CODE(outc->size, c, ++a; *++c = *a * *a - inb;)
        return outc;
}

PyrObject* signal_sumsqr_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        inb = inb * inb;
        UNROLL_CODE(outc->size, c, ++a; *++c = *a * *a + inb;)
        return outc;
}

PyrObject* signal_sqrsum_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        float temp;
        UNROLL_CODE(outc->size, c, ++a; temp = *a + inb; *++c = temp * temp;)
        return outc;
}

PyrObject* signal_sqrdif_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        float temp;
        UNROLL_CODE(outc->size, c, ++a; temp = *a - inb; *++c = temp * temp;)
        return outc;
}

PyrObject* signal_absdif_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, ++a; *++c = fabs(*a - inb); )
        return outc;
}

PyrObject* signal_ring1_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, *++c = ina * *++b + ina;)
        return outc;
}

PyrObject* signal_ring2_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, ++b; *++c = ina * *b + ina + *b;)
        return outc;
}

PyrObject* signal_ring3_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        float ina2 = ina * ina;
        UNROLL_CODE(outc->size, c, *++c = ina2 * *++b;)
        return outc;
}

PyrObject* signal_ring4_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        float ina2 = ina * ina;
        UNROLL_CODE(outc->size, c, ++b; *++c = ina2 * *b - ina * *b * *b;)
        return outc;
}

PyrObject* signal_thresh_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++b; *++c = ina < *b ? 0.f : ina;)
        return outc;
}

PyrObject* signal_amclip_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++b; *++c = *b <= 0.f ? 0.f : ina * *b;)
        return outc;
}

PyrObject* signal_sub_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, *++c = ina - *++b;)
        return outc;
}

PyrObject* signal_div_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, *++c = ina / *++b;)
        return outc;
}

PyrObject* signal_difsqr_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        ina = ina * ina;
        UNROLL_CODE(outc->size, c, ++b; *++c = ina - *b * *b;)
        return outc;
}

PyrObject* signal_sumsqr_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        ina = ina * ina;
        UNROLL_CODE(outc->size, c, ++b; *++c = ina + *b * *b;)
        return outc;
}

PyrObject* signal_sqrsum_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float temp;
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, ++b; temp = ina + *b; *++c = temp * temp;)
        return outc;
}

PyrObject* signal_sqrdif_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float temp;
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, ++b; temp = ina - *b; *++c = temp * temp;)
        return outc;
}

PyrObject* signal_absdif_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL_CODE(outc->size, c, ++b; *++c = fabs(ina - *b);)
        return outc;
}

PyrObject* signal_min_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = *a < *b ? *a : *b;
        );
}

PyrObject* signal_max_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = *a > *b ? *a : *b;
        );
}

PyrObject* signal_scaleneg_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = *a < 0.f ? *a * *b : *a;
        );
}

PyrObject* signal_clip2_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = *a > *b ? *b : (*a < -*b ? -*b : *a);
        );
}

PyrObject* signal_fold2_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = sc_fold(*a, -*b, *b);
        );
}

PyrObject* signal_wrap2_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = sc_wrap(*a, -*b, *b);
        );
}

PyrObject* signal_excess_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        BINOP_LOOP2(
                ++a; ++b; *++c = *a > *b ? *a - *b : (*a < -*b ? *a + *b : 0.f);
        );
}

bool signal_equal_xx(VMGlobals *g, PyrObject* ina, PyrObject* inb)
{
        float *a = (float*)(ina->slots) - 1;
        float *b = (float*)(inb->slots) - 1;
        float *endptr = a + ina->size;
        if (ina->size != inb->size) return false;
        if (slotRawSymbol(&ina->slots[ kSignalRate ]) != slotRawSymbol(&inb->slots[ kSignalRate ])) return false;
        while (a < endptr) { if (*a++ != *b++) return false; }
        return true;
}

PyrObject* signal_min_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++a; *++c = *a < inb ? *a : inb;)
        return outc;
}

PyrObject* signal_max_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++a; *++c = *a > inb ? *a : inb;)
        return outc;
}

PyrObject* signal_scaleneg_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++a; *++c = *a < 0.f ? *a * inb : *a;)
        return outc;
}

PyrObject* signal_clip2_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++a; *++c = *a > inb ? inb : (*a < -inb ? -inb : *a);)
        return outc;
}

PyrObject* signal_fold2_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++a; *++c = sc_fold(*a, -inb, inb);)
        return outc;
}

PyrObject* signal_wrap2_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++a; *++c = sc_wrap(*a, -inb, inb);)
        return outc;
}

PyrObject* signal_excess_xf(VMGlobals *g, PyrObject* ina, float inb)
{
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a = (float*)(ina->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++a; *++c = *a > inb ? *a - inb : (*a < -inb ? *a + inb : 0.f);)
        return outc;
}

PyrObject* signal_scaleneg_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        if (ina < 0.f) {
                 UNROLL1_CODE(outc->size, c, *++c = ina * *++b;);
        } else {
                 UNROLL1_CODE(outc->size, c, *++c = ina;);
        }
        return outc;
}

PyrObject* signal_clip2_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++b; *++c = ina > *b ? *b : (ina < -*b ? -*b : ina);)
        return outc;
}

PyrObject* signal_fold2_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++b; *++c = sc_fold(ina, -*b, *b);)
        return outc;
}

PyrObject* signal_wrap2_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++b; *++c = sc_wrap(ina, -*b, *b);)
        return outc;
}

PyrObject* signal_excess_fx(VMGlobals *g, float ina, PyrObject* inb)
{
        PyrObject *outc = newPyrSignal(g, inb->size);
        float *b = (float*)(inb->slots) - 1;
        float *c = (float*)(outc->slots) - 1;
        UNROLL1_CODE(outc->size, c, ++b; *++c = ina > *b ? ina - *b : (ina < -*b ? ina + *b : 0.f);)
        return outc;
}

PyrObject* signal_invert(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL_CODE(inPyrSignal->size, out, *++out = -*++in;)
        return outc;
}

PyrObject* signal_recip(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL_CODE(inPyrSignal->size, out, *++out = 1.f / *++in;)
        return outc;
}

PyrObject* signal_squared(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL_CODE(inPyrSignal->size, out, ++in; *++out = *in * *in;)
        return outc;
}

PyrObject* signal_cubed(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL_CODE(inPyrSignal->size, out, ++in; *++out = *in * *in * *in;)
        return outc;
}

// PowerPC has a fast fabs instruction
PyrObject* signal_abs(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL_CODE(inPyrSignal->size, out, *++out = fabs(*++in);)
        return outc;
}

float signal_findpeak(PyrObject *inPyrSignal)
{
        float *out = (float*)(inPyrSignal->slots) - 1;
        float peak = 0.f;
        float z;
        UNROLL1_CODE(inPyrSignal->size, out, ++out; z = fabs(*out); peak = z>peak ? z : peak;)
        return peak;
}

PyrObject* signal_normalize_transfer_fn(PyrObject *inPyrSignal)
{
        float *out, scale, offset, x, maxval;
        long length, halflength;

        maxval = 0.0;
        out = (float*)(inPyrSignal->slots) - 1;
        length = inPyrSignal->size;
        halflength = length >> 1;
        offset = (out[halflength-1] + out[halflength]) * 0.5;

        UNROLL1_CODE(inPyrSignal->size, out, ++out;
                x = *out - offset;
                x = (x < 0.) ? -x : x;
                if (x > maxval) maxval = x;
        );
        if (maxval) {
                out = (float*)(inPyrSignal->slots) - 1;
                scale = 1.0 / maxval;
                UNROLL1_CODE(inPyrSignal->size, out, ++out;
                        *out = (*out - offset) * scale;
                );
        }
        return inPyrSignal;
}


float signal_integral(PyrObject *inPyrSignal)
{
        float *out = (float*)(inPyrSignal->slots) - 1;
        float sum = 0.f;
        UNROLL1_CODE(inPyrSignal->size, out, sum += *++out;)
        return sum;
}

PyrObject* signal_sign(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, ++in; *++out = *in < 0.f ? -1.f : (*in > 0.f ? 1.f : 0.f);)
        return outc;
}

PyrObject* signal_negative(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = *++in < 0.f ? 1.f : 0.f;)
        return outc;
}

PyrObject* signal_positive(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = *++in >= 0.f ? 1.f : 0.f;)
        return outc;
}

PyrObject* signal_strictly_positive(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = *++in > 0.f ? 1.f : 0.f;)
        return outc;
}

PyrObject* signal_nyqring(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        float *endptr = out + inPyrSignal->size;
        switch (inPyrSignal->size & 3) {
                while (out < endptr) {
                                 *++out = -*++in;
                        case 3 : *++out =  *++in;
                        case 2 : *++out = -*++in;
                        case 1 : *++out =  *++in;
                        case 0 : ;
                }
        }
        return outc;
}

PyrObject* signal_clip_f(VMGlobals *g, PyrObject *inPyrSignal, float lo, float hi)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        float *endptr = out + inPyrSignal->size;
        while (out < endptr) {
                ++in; *++out = *in < lo ? lo : (*in > hi ? hi : *in);
        }
        return outc;
}

PyrObject* signal_clip_x(VMGlobals *g, PyrObject *ina, PyrObject *inb, PyrObject *inc)
{
        PyrObject *outd;
        float *a, *b, *c, *d, *endptr;
        long minsize = sc_min(ina->size, inb->size);
        minsize = sc_min(minsize, inc->size);
        outd = newPyrSignal(g, minsize);
        a = (float*)(ina->slots) - 1;
        b = (float*)(inb->slots) - 1;
        c = (float*)(inc->slots) - 1;
        d = (float*)(outd->slots) - 1;
        endptr = a + minsize;
        UNROLL1_CODE(outd->size, d, ++a; ++b; ++c; *++d = *a < *b ? *b : (*a > *c ? *c : *a););
        return outd;
}


/// WRAP AND FOLD ARE STILL INCORRECT !

PyrObject* signal_wrap_f(VMGlobals *g, PyrObject *inPyrSignal, float lo, float hi)
{
        float *out = (float*)(inPyrSignal->slots) - 1;
        float *endptr = out + inPyrSignal->size;
        while (out < endptr) {
                ++out; *out = sc_wrap(*out, lo, hi);
        }
        return inPyrSignal;
}

PyrObject* signal_wrap_x(VMGlobals *g, PyrObject *ina, PyrObject *inb, PyrObject *inc)
{
        PyrObject *outd;
        float *a, *b, *c, *d, *endptr;
        long minsize = sc_min(ina->size, inb->size);
        minsize = sc_min(minsize, inc->size);
        outd = newPyrSignal(g, minsize);
        a = (float*)(ina->slots) - 1;
        b = (float*)(inb->slots) - 1;
        c = (float*)(inc->slots) - 1;
        d = (float*)(outd->slots) - 1;
        endptr = d + outd->size;
        while (d < endptr) {
                a++;    b++;    c++;    d++;
                ++d; *d = sc_wrap(*a, *b, *c);
        }
        return outd;
}

PyrObject* signal_fold_f(VMGlobals *g, PyrObject *inPyrSignal, float lo, float hi)
{
        float *out = (float*)(inPyrSignal->slots) - 1;
        float *endptr = out + inPyrSignal->size;
        while (out < endptr) {
                ++out; *out = sc_fold(*out, lo, hi);
        }
        return inPyrSignal;
}

PyrObject* signal_fold_x(VMGlobals *g, PyrObject *ina, PyrObject *inb, PyrObject *inc)
{
        PyrObject *outd;
        float *a, *b, *c, *d, *endptr;
        long minsize = sc_min(ina->size, inb->size);
        minsize = sc_min(minsize, inc->size);
        outd = newPyrSignal(g, minsize);
        a = (float*)(ina->slots) - 1;
        b = (float*)(inb->slots) - 1;
        c = (float*)(inc->slots) - 1;
        d = (float*)(outd->slots) - 1;
        endptr = d + outd->size;
        while (d < endptr) {
                a++;    b++;    c++;    d++;
                *d = sc_fold(*a, *b, *c);
        }
        return outd;
}

PyrObject* signal_log(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = log(*++in);)
        return outc;
}

#ifdef SC_WIN32
// in PyrMathSupport.cpp
double log2(double x);
#elif defined(__FreeBSD__)
 double log2(double x);
#endif

PyrObject* signal_log2(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = log2(*++in);)
        return outc;
}

PyrObject* signal_log10(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = log10(*++in);)
        return outc;
}


PyrObject* signal_sin(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = sin(*++in);)
        return outc;
}

PyrObject* signal_cos(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = cos(*++in);)
        return outc;
}

PyrObject* signal_tan(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = tan(*++in);)
        return outc;
}

PyrObject* signal_sinh(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = sinh(*++in);)
        return outc;
}

PyrObject* signal_cosh(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = cosh(*++in);)
        return outc;
}

PyrObject* signal_tanh(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = tanh(*++in);)
        return outc;
}

PyrObject* signal_tanh_ds(PyrObject *inPyrSignal)
{
        float *out = (float*)(inPyrSignal->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, ++out; *out = tanh(*out);)
        return inPyrSignal;
}

PyrObject* signal_asin(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = asin(*++in);)
        return outc;
}

PyrObject* signal_acos(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = acos(*++in);)
        return outc;
}

PyrObject* signal_atan(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = atan(*++in);)
        return outc;
}

PyrObject* signal_exp(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = exp(*++in);)
        return outc;
}

PyrObject* signal_sqrt(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        UNROLL1_CODE(inPyrSignal->size, out, *++out = sqrt(*++in);)
        return outc;
}

PyrObject* signal_distort(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        float *endptr = out + inPyrSignal->size;
        while (out < endptr) {
                float z = *++in;
                if (z < 0.f) *++out = z/(1.f - z);
                else *++out = z/(1.f + z);
        }
        return outc;
}

PyrObject* signal_softclip(VMGlobals *g, PyrObject *inPyrSignal)
{
        float *in = (float*)(inPyrSignal->slots) - 1;
        PyrObject *outc = newPyrSignal(g, inPyrSignal->size);
        float *out = (float*)(outc->slots) - 1;
        float *endptr = out + inPyrSignal->size;
        while (out < endptr) {
                float z = *++in;
                if (z < -0.5f) *++out = (-z - .25f)/z;
                else if (z > 0.5f) *++out = (z - .25f)/z;
                else *++out = z;
        }
        return outc;
}


PyrObject* signal_rotate(VMGlobals *g, PyrObject* ina, int rot)
{
        long i, j;
        PyrObject *outc = newPyrSignal(g, ina->size);
        float *a0 = (float*)(ina->slots) - 1;
//      float *a = a0 + sc_mod(rot, ina->size);
        float *a = a0 + sc_mod(0 - rot, ina->size);
        float *aend = a0 + ina->size;
        float *c = (float*)(outc->slots) - 1;
        long nsmps = outc->size;
        for (i=0,j=rot; i<nsmps; i++, j++) {
                *++c = *++a;
                if (a >= aend) a = a0;
        }
        return outc;
}

PyrObject* signal_reverse_range(PyrObject* ina, long start, long end)
{
        long size = ina->size;
        long size2;
        long i;
        start = sc_max(0, start);
        end = sc_min(end + 1, size);
        size = end - start;
        size2 = size>>1;
        float *a = (float*)(ina->slots) - 1 + start;
//      float *b = (float*)(ina->slots) - 1 + end;
        float *b = (float*)(ina->slots) + end;
        float temp;
        for (i=0; i<size2; ++i) {
                temp = *++a;
                *a = *--b;
                *b = temp;
        }
        return ina;
}

PyrObject* signal_normalize_range(PyrObject* ina, long start, long end)
{
        long size = ina->size;
        long i;
        float z, scale, maxlevel;
        float *a0, *a;
        start = sc_max(0, start);
        end = sc_min(end + 1, size);
        size = end - start;
        a0 = (float*)(ina->slots) - 1 + start;
        a = a0;
        maxlevel = 0.f;
        for (i=0; i<size; ++i) {
                z = fabs(*++a);
                if (z > maxlevel) maxlevel = z;
        }
        a = a0;
        if (maxlevel != 0.f) {
                scale = 1./maxlevel;
                for (i=0; i<size; ++i) {
                        z = *++a;
                        *a = scale * z;
                }
        }
        return ina;
}

PyrObject* signal_invert_range(PyrObject* ina, long start, long end)
{
        long size = ina->size;
        long i;
        float z;
        start = sc_max(0, start);
        end = sc_min(end, size);
        size = end - start + 1;
        float *a = (float*)(ina->slots) - 1 + start;

        for (i=0; i<size; ++i) {
                z = *++a; *a = -z;
        }
        return ina;
}


PyrObject* signal_fade_range(PyrObject* ina, long start, long end, float lvl0, float lvl1)
{
        long size = ina->size;
        long i;
        float z, level, slope;
        start = sc_max(0, start);
        end = sc_min(end + 1, size);
        size = end - start;
        float *a = (float*)(ina->slots) - 1 + start;
        slope = (lvl1 - lvl0) / size;
        level = lvl0;
        for (i=0; i<size; ++i) {
                z = *++a;
                *a = z * level;
                level += slope;
        }
        return ina;
}


PyrObject* signal_overdub(VMGlobals *g, PyrObject* ina, PyrObject* inb, long index)
{
        float *a, *b;
        long len;

        if (index > 0) {
                a = (float*)(ina->slots) + index - 1;
                b = (float*)(inb->slots) - 1;
                len = sc_min(inb->size, ina->size - index);
        } else {
                a = (float*)(ina->slots) - 1;
                b = (float*)(inb->slots) - index - 1;
                len = sc_min(ina->size, inb->size + index);
        }

        UNROLL_CODE(len, a,  *++a += *++b;);

        return ina;
}

PyrObject* signal_overwrite(VMGlobals *g, PyrObject* ina, PyrObject* inb, long index)
{
        float *a, *b;
        long len;
        if (index > 0) {
                a = (float*)(ina->slots) + index - 1;
                b = (float*)(inb->slots) - 1;
                len = sc_min(inb->size, ina->size - index);
        } else {
                a = (float*)(ina->slots) - 1;
                b = (float*)(inb->slots) - index - 1;
                len = sc_min(ina->size, inb->size + index);
        }

        UNROLL_CODE(len, a,  *++a = *++b;);

        return ina;
}