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/*
FFTease - A set of Live Spectral Processors
Originally written by Eric Lyon and Christopher Penrose for the Max/MSP platform
Copyright (c)Thomas Grill (xovo@gmx.net)
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "license.txt," in this distribution.
*/
#include "main.h"
#include <stdlib.h>
class shapee:
public fftease
{
FLEXT_HEADER(shapee,fftease)
public:
shapee(I argc,const t_atom *argv);
protected:
virtual V Transform(I n,S *const *in);
BL _qual;
};
FLEXT_LIB_DSP_V("fftease, shapee~",shapee)
shapee::shapee(I argc,const t_atom *argv):
fftease(2,F_STEREO|F_BITSHUFFLE),
_qual(false)
{
/* parse and set object's options given */
if(argc >= 1) {
if(CanbeBool(argv[0]))
_qual = GetABool(argv[0]);
else
post("%s - Quality must be a boolean value - set to %0i",thisName(),_qual?1:0);
}
if(_qual) {
Mult(4);
_flags |= F_BALANCED;
}
else
Mult(2);
AddInSignal("Messages and frequency reference signal");
AddInSignal("Amplitude reference signal");
AddOutSignal("Transformed signal");
}
#define THRESH 0.000001
V shapee::Transform(I _N,S *const *)
{
// lets just shape the entire signal in groups of three
I i;
for ( i=2; i <= _N; i += 6 ) {
const F ref = _channel1[i];
F lowerMult,upperMult;
if(!ref)
lowerMult = upperMult = 1;
else {
lowerMult = _channel1[i-2] / ref;
upperMult = _channel1[i+2] / ref;
}
F newCenter = ( _channel2[i-2]+_channel2[i]+_channel2[i+2] ) / (upperMult + lowerMult + 1);
_channel2[i-2] = lowerMult * newCenter;
_channel2[i+2] = upperMult * newCenter;
_channel2[i] = newCenter;
}
for ( i=0; i <= _N; i+=2 ) {
_channel1[i] = _channel2[i];
if ( _channel1[i] == 0. )
_channel1[i+1] = 0.;
else if( _channel1[i+1] == 0. )
_channel1[i+1] = _channel2[i+1];
}
}
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