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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. */
/* */
/* */
/* fftbuf~ fades between two buffers. it is intended to be used as fft */
/* synthesis tool... */
/* */
/* */
/* fftbuf~ 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: Jérôme Noetinger/ErikM: What a Wonderful World */
/* Cosmos: Tears */
/* Burkhard Stangl/Dieb13: eh */
/* */
#include <flext.h>
#if !defined(FLEXT_VERSION) || (FLEXT_VERSION < 401)
#error upgrade your flext version!!!!!!
#endif
class fftbuf: public flext_dsp
{
FLEXT_HEADER(fftbuf,flext_dsp);
public: // constructor
fftbuf(int);
~fftbuf();
protected:
virtual void m_signal (int n, float *const *in, float *const *out);
bool check(buffer *);
void set_buf(int argc, t_atom *argv); //selects a new buffer
void set_line(int argc, t_atom *argv); //sets the time for the transformance
template<typename T>
void clear(T *); //destroys an object
void perform(); //starts transformation
int blknumber(); //number of blocks that a performance needs
private:
FLEXT_CALLBACK_V(set_buf);
FLEXT_CALLBACK_V(set_line);
FLEXT_CALLBACK(perform);
float *ins;
float *outs;
t_symbol * bufname;
buffer * buf;
int delay; //delay for fading from local buffer to new one
t_sample * data; // pointer to array of samples
t_sample * offset; // pointer to array of samples
int bs; //blocksize+1
int sr; //samplerate
int counter;
};
FLEXT_LIB_DSP_1("bufline~",fftbuf,int);
fftbuf::fftbuf(int arg):
buf(NULL),data(NULL),sr(Samplerate()),delay(0),counter(0)
{
bs=arg+1;
AddInAnything();
AddOutSignal();
FLEXT_ADDMETHOD_(0,"set",set_buf);
FLEXT_ADDMETHOD_(0,"line",set_line);
FLEXT_ADDBANG(0,perform);
data= new t_sample[bs];
offset= new t_sample[bs];
ZeroSamples(data,bs);
ZeroSamples(offset,bs);
}
fftbuf::~fftbuf()
{
delete data;
delete offset;
}
void fftbuf::m_signal(int n, t_float *const *in, t_float *const *out)
{
outs = out[0];
if (counter!=0)
{
n=n/2+1;
while (--n)
data[n] = data[n] - offset[n];
/* for(int i=0;i!=bs;++i)
{
data[i] = data[i] - offset[i];
}
*/
--counter;
}
CopySamples(out[0],data,bs);
}
void fftbuf::perform()
{
counter=blknumber();
if (counter)
{
for(int i=0;i!=bs;++i)
{
offset[i]=(data[i]-*(buf->Data()+i))/counter;
}
}
else
{
CopySamples(data,buf->Data(),bs);
}
}
void fftbuf::set_buf(int argc, t_atom *argv)
{
if(argc == 0)
{
post("No buffer selected!!!");
return;
}
if (argc == 1 && IsSymbol(argv[0]))
{
clear(buf);
bufname=GetSymbol(argv[0]);
buf= new buffer(bufname);
if(!buf->Ok())
{
post("buffer %s is currently not valid",bufname);
}
}
else if ((argc == 2 && IsSymbol(argv[0]) &&
(IsInt(argv[1]) || IsFloat(argv[1]))))
{
clear(buf);
bufname=GetSymbol(argv[0]);
buf= new buffer(bufname);
if(!buf->Ok())
{
post("buffer %s is currently not valid",bufname);
return;
}
delay=GetInt(argv[1]);
}
}
template<typename T>
/*inline*/ void fftbuf::clear(T* buf)
{
if (buf)
{
delete buf;
buf=NULL;
}
}
inline bool fftbuf::check(buffer * buf)
{
//code taken from the flext tutorial (buffer 1) by thomas grill
if(buf->Update())
{
// buffer parameters have been updated
if(buf->Valid())
{
post("%s (%s) - updated buffer reference",
thisName(),GetString(thisTag()));
return true;
}
else
{
post("%s (%s) - buffer has become invalid",
thisName(),GetString(thisTag()));
return false;
}
}
else
return true;
}
void fftbuf::set_line(int argc, t_atom *argv)
{
if(argc==1 && (IsInt(argv[0]) || IsFloat(argv[0])))
{
delay=GetInt(argv[0]);
}
else
post("syntax incorrect");
}
inline int fftbuf::blknumber()
{
// post("%i %i %i",delay,bs,sr);
// post("computer counter: %i",delay*bs/sr*1000);
return delay*bs/sr*1000; //ms/sample
}
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