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/*
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
*/
//PV_UGens by Batuhan Bozkurt http://www.batuhanbozkurt.com
//#include "SC_PlugIn.h"
//#include "SCComplex.h"
#include "FFT_UGens.h"
#define PV_GET_BUF2_FCOMPARE \
float fbufnum1 = ZIN0(0); \
float fbufnum2 = ZIN0(1); \
if (fbufnum1 < 0.f || fbufnum2 < 0.f) { ZOUT0(0) = unit->outVal; return; } \
ZOUT0(0) = unit->outVal; \
uint32 ibufnum1 = (int)fbufnum1; \
uint32 ibufnum2 = (int)fbufnum2; \
World *world = unit->mWorld; \
SndBuf *buf1; \
SndBuf *buf2; \
if (ibufnum1 >= world->mNumSndBufs) { \
int localBufNum = ibufnum1 - world->mNumSndBufs; \
Graph *parent = unit->mParent; \
if(localBufNum <= parent->localBufNum) { \
buf1 = parent->mLocalSndBufs + localBufNum; \
} else { \
buf1 = world->mSndBufs; \
} \
} else { \
buf1 = world->mSndBufs + ibufnum1; \
} \
if (ibufnum2 >= world->mNumSndBufs) { \
int localBufNum = ibufnum2 - world->mNumSndBufs; \
Graph *parent = unit->mParent; \
if(localBufNum <= parent->localBufNum) { \
buf2 = parent->mLocalSndBufs + localBufNum; \
} else { \
buf2 = world->mSndBufs; \
} \
} else { \
buf2 = world->mSndBufs + ibufnum2; \
} \
if (buf1->samples != buf2->samples) return; \
int numbins = (buf1->samples - 2) >> 1;
InterfaceTable *ft;
struct FrameCompare : PV_Unit
{
float magSum;
int numFrames;
float outVal;
};
extern "C"
{
void FrameCompare_Ctor(FrameCompare* unit);
void FrameCompare_Dtor(FrameCompare* unit);
void FrameCompare_next(FrameCompare* unit, int inNumSamples);
}
//SCPolarBuf* ToPolarApx(SndBuf *buf)
//{
// if (buf->coord == coord_Complex) {
// SCComplexBuf* p = (SCComplexBuf*)buf->data;
// int numbins = buf->samples - 2 >> 1;
// for (int i=0; i<numbins; ++i) {
// p->bin[i].ToPolarApxInPlace();
// }
// buf->coord = coord_Polar;
// }
// return (SCPolarBuf*)buf->data;
//}
//
//SCComplexBuf* ToComplexApx(SndBuf *buf)
//{
// if (buf->coord == coord_Polar) {
// SCPolarBuf* p = (SCPolarBuf*)buf->data;
// int numbins = buf->samples - 2 >> 1;
// for (int i=0; i<numbins; ++i) {
// p->bin[i].ToComplexApxInPlace();
// }
// buf->coord = coord_Complex;
// }
// return (SCComplexBuf*)buf->data;
//}
//FrameCompare
//Gives a similarity rating for two (short duration) sound sources.
//Smaller the output, more similar the source and target.
//Compares magnitudes only.
//Distance metrics formula taken from an article by Ricardo A. Garcia:
//(Growing Sound Synthesizers Using Evolutionary Methods)
//http://galileo.cincom.unical.it/Music/workshop/articoli/garcia.pdf
void FrameCompare_Ctor(FrameCompare* unit)
{
SETCALC(FrameCompare_next);
unit->magSum = 0.f, unit->numFrames = 0;
ZOUT0(0) = unit->outVal = ZIN0(0);
}
void FrameCompare_next(FrameCompare *unit, int inNumSamples)
{
PV_GET_BUF2_FCOMPARE
float minTargetMag = 900000.f, maxTargetMag = 0.f;
float magdiff, magweight, lmtemp, minmaxtemp, p1mag, p2mag, scaleFactor;
float wOffset = ZIN0(2);
SCPolarBuf *p1 = ToPolarApx(buf1); //rendered
SCPolarBuf *p2 = ToPolarApx(buf2); //target
scaleFactor = (numbins + 1) * 0.5; //hanning window only
//Print("%f\n", p2->bin[100].mag / scaleFactor);
for(int i = 0; i < numbins; ++i)
{
p2mag = p2->bin[i].mag / scaleFactor;
minmaxtemp = (p2mag < 2e-42) ? log(2e-42) : log(fabs(p2mag));
minTargetMag = (minmaxtemp <= minTargetMag) ? minmaxtemp : minTargetMag;
maxTargetMag = (minmaxtemp >= maxTargetMag) ? minmaxtemp : maxTargetMag;
}
for(int i = 0; i < numbins; ++i)
{
p1mag = p1->bin[i].mag / scaleFactor;
p2mag = p2->bin[i].mag / scaleFactor;
magdiff = fabs(p1mag) - fabs(p2mag);
lmtemp = p2mag < 2e-42 ? log(2e-42) : log(fabs(p2mag));
magweight = (1 - wOffset) + (wOffset * ((lmtemp - minTargetMag) / fabs(minTargetMag - maxTargetMag)));
unit->magSum = unit->magSum + (magdiff * magdiff * magweight);
}
unit->numFrames = unit->numFrames + 1;
ZOUT0(0) = unit->outVal = unit->magSum/unit->numFrames;
}
void FrameCompare_Dtor(FrameCompare* unit)
{
}
void init_SCComplex(InterfaceTable *inTable);
PluginLoad(BatPV)
{
ft = inTable;
init_SCComplex(inTable);
DefineDtorUnit(FrameCompare);
}
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