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/* Copyright (c) 2003 Tim Blechmann. */
/* For information on usage and redistribution, and for a DISCLAIMER OF ALL */
/* WARRANTIES, see the file, "COPYING" in this distribution. */
/* */
/* */
/* fftgrshuf divides the incoming fft signal into single grains and reverses */
/* the samples in every grain */
/* */
/* fftgrrev uses the flext C++ layer for Max/MSP and PD externals. */
/* get it at http://www.parasitaere-kapazitaeten.de/PD/ext */
/* thanks to Thomas Grill */
/* */
/* */
/* */
/* 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. */
/* */
/* See file LICENSE for further informations on licensing terms. */
/* */
/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* */
/* Based on PureData by Miller Puckette and others. */
/* */
/* */
/* */
/* coded while listening to: Howard Skempton/John Tilbury: Well, well, Cornelius*/
/* */
/* */
#include <flext.h>
#include <algorithm>
#if !defined(FLEXT_VERSION) || (FLEXT_VERSION < 401)
#error upgrade your flext version!!!!!!
#endif
class fftgrrev: public flext_dsp
{
FLEXT_HEADER(fftgrrev,flext_dsp);
public: // constructor
fftgrrev(int);
protected:
virtual void m_signal (int n, float *const *in, float *const *out);
void set_grains(t_int);
void set_offset(t_int);
void set_reverse();
private:
FLEXT_CALLBACK_1(set_grains,t_int)
FLEXT_CALLBACK_1(set_offset,t_int)
t_int grains;
t_int grainsize;
t_int offset;
t_int bs; //blocksize
t_int bs1; //bs+1
t_sample * data; //array with data
t_sample * d1; //1. element in array with data
t_sample * dend; //1 element after the last element
bool reverse;
};
FLEXT_LIB_DSP_1("fftgrrev~",fftgrrev,int)
fftgrrev::fftgrrev(int arg):
grains(1),offset(0)
{
bs=arg/2;
grainsize=bs;
bs1=bs+1;
post("blocksize: %i",bs);
data = new t_sample[bs+1];
data[0]=0;
d1=data+1;
dend=data+bs+1;
AddInSignal();
AddOutSignal();
FLEXT_ADDMETHOD_I(0,"grains",set_grains);
FLEXT_ADDMETHOD_I(0,"offset",set_offset);
}
void fftgrrev::m_signal(int n, t_float * const *in, t_float *const *out)
{
t_sample * ins = in[0];
t_sample * outs = out[0];
if (offset>0)
{
CopySamples(d1+bs-offset,ins,offset);
CopySamples(d1,ins+offset,bs-offset);
}
else if (offset<0)
{
CopySamples(d1-offset,ins,bs+offset);
CopySamples(d1,ins+bs+offset,-offset);
}
else
CopySamples(data,ins,bs1);
//grains
int counter=1;
while (counter!=grains)
{
std::reverse(d1+grainsize*(counter-1),d1+grainsize*counter);
++counter;
}
std::reverse(d1+grainsize*(counter-1),dend);
CopySamples(outs,data,bs1);
}
void fftgrrev::set_offset(t_int o)
{
if (o-bs<0 && o+bs>0)
{
offset=-o;
}
else
post("Offset out of range!");
}
void fftgrrev::set_grains(t_int g)
{
if ( (g > 0) )
{
grains=g;
grainsize=(bs)/grains;
}
}
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