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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"
class burrow:
public fftease
{
FLEXT_HEADER_S(burrow,fftease,setup)
public:
burrow(I argc,const t_atom *argv);
protected:
virtual V Transform(I _N2,S *const *in);
BL _invert;
F _threshold,_multiplier;
F _thresh_dB,_mult_dB;
private:
V ms_thresh(F v) { _threshold = FromdB(_thresh_dB = v); }
V ms_mult(F v) { _multiplier = FromdB(_mult_dB = v); }
static V setup(t_classid c);
FLEXT_ATTRGET_F(_thresh_dB)
FLEXT_CALLSET_F(ms_thresh)
FLEXT_ATTRGET_F(_mult_dB)
FLEXT_CALLSET_F(ms_mult)
FLEXT_ATTRVAR_B(_invert)
};
FLEXT_LIB_DSP_V("fftease, burrow~",burrow)
V burrow::setup(t_classid c)
{
FLEXT_CADDATTR_VAR(c,"thresh",_thresh_dB,ms_thresh);
FLEXT_CADDATTR_VAR(c,"mult",_mult_dB,ms_mult);
FLEXT_CADDATTR_VAR1(c,"invert",_invert);
}
burrow::burrow(I argc,const t_atom *argv):
fftease(4,F_STEREO|F_BALANCED|F_BITSHUFFLE|F_NOPH2),
_invert(false),
_thresh_dB(-30),_mult_dB(-18)
{
/* parse and set object's options given */
if(argc >= 1) {
if(CanbeFloat(argv[0]))
_thresh_dB = GetAFloat(argv[0]);
else
post("%s - Threshold must be a float value - set to %0f",thisName(),_thresh_dB);
}
if(argc >= 2) {
if(CanbeFloat(argv[1]))
_mult_dB = GetAFloat(argv[1]);
else
post("%s - Multiplier must be a float value - set to %0f",thisName(),_mult_dB);
}
if(argc >= 3) {
if(CanbeBool(argv[2]))
_invert = GetABool(argv[2]);
else
post("%s - Invert flag must be a boolean value - set to %i",thisName(),_invert?1:0);
}
ms_thresh(_thresh_dB);
ms_mult(_mult_dB);
AddInSignal("Messages and input signal");
AddInSignal("Reference signal");
AddOutSignal("Transformed signal");
}
V burrow::Transform(I _N,S *const *)
{
register const F thr = _threshold,mul = _multiplier;
// use simple threshold from second signal to trigger filtering
// transform does not need phase of signal 2
if(_invert)
for (I i = 0; i <= _N; i += 2)
if(_channel2[i] < thr) _channel1[i] *= mul;
else
for (I i = 0; i <= _N; i += 2)
if(_channel2[i] > thr) _channel1[i] *= mul;
}
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