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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 drown:
public fftease
{
FLEXT_HEADER(drown,fftease)
public:
drown(I argc,const t_atom *argv);
protected:
virtual V Transform(I n,S *const *in);
};
FLEXT_LIB_DSP_V("fftease, drown~",drown)
drown::drown(I argc,const t_atom *argv):
fftease(4,F_WINDOW)
{
AddInSignal("Messages and input signal");
AddInSignal("Threshold generator signal");
AddInSignal("Multiplier signal for weak bins");
AddOutSignal("Transformed signal");
}
V drown::Transform(I _N2,S *const *in)
{
// only first value of the signal vectors
const F thresh = in[0][0],mult = in[1][0];
// nudist helper function is integrated
for (I i = 0; i <= _N2; i++ ) {
const I real = i*2,imag = real+1;
F amp,phase;
// convert to amp and phase
const F a = ( i == _N2 ? _buffer1[1] : _buffer1[real] );
const F b = ( i == 0 || i == _N2 ? 0. : _buffer1[imag] );
amp = hypot( a, b );
// make up low amplitude bins
if(amp < thresh) amp *= mult;
phase = -atan2( b, a );
// convert back to real and imag
_buffer1[real] = amp * cos( phase );
if (i != _N2) _buffer1[imag] = -amp * sin( phase );
}
}
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