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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 morphine:
public fftease
{
FLEXT_HEADER_S(morphine,fftease,setup)
public:
morphine(I argc,const t_atom *argv);
protected:
virtual V Transform(I n,S *const *in);
F _index;
struct pickme { I bin; F value; };
static I sortpicks( const V *a, const V *b );
pickme *_picks;
private:
virtual V Set();
virtual V Clear();
virtual V Delete();
static V setup(t_classid c);
FLEXT_ATTRVAR_F(_index)
};
FLEXT_LIB_DSP_V("morphine~",morphine)
V morphine::setup(t_classid c)
{
FLEXT_CADDATTR_VAR1(c,"index",_index);
}
morphine::morphine(I argc,const t_atom *argv):
fftease(4,F_STEREO|F_BALANCED|F_BITSHUFFLE),
_index(0)
{
/* parse and set object's options given */
if(argc >= 1) {
if(CanbeFloat(argv[0]))
_index = GetAFloat(argv[0]);
else
post("%s - Index must be a float value - set to %f",thisName(),_index);
}
AddInSignal("Messages and input signal 1");
AddInSignal("Input signal 2");
AddOutSignal("Transformed signal");
}
V morphine::Clear()
{
_picks = NULL;
fftease::Clear();
}
V morphine::Delete()
{
fftease::Delete();
if(_picks) delete[] _picks;
}
V morphine::Set()
{
fftease::Set();
_picks = new pickme[get_N()/2+1];
}
I morphine::sortpicks( const void *a, const void *b )
{
if ( ((pickme *)a)->value > ((pickme *) b)->value ) return 1;
if ( ((pickme *) a)->value < ((pickme *) b)->value ) return -1;
return 0;
}
V morphine::Transform(I _N,S *const *)
{
const I _N2 = _N/2;
I i;
for ( i = 0; i <= _N2; i++ ) {
// find amplitude differences between home and visitors
_picks[i].value = fabs( _channel1[i*2] - _channel2[i*2]);
_picks[i].bin = i;
}
// sort our differences in ascending order
qsort( _picks, _N2+1, sizeof(pickme), sortpicks );
I ix2 = (I)(_index*(_N2+1)+.5)*2;
if(ix2 < 0) ix2 = 0;
else if(ix2 > _N+2) ix2 = _N+2;
// choose the bins that are least different first
for (i=0; i < ix2; i += 2) {
_channel1[i] = _channel2[i];
_channel1[i+1] = _channel2[i+1];
}
}
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