diff options
Diffstat (limited to 'tbext/source')
| -rw-r--r-- | tbext/source/tbfft1.cpp | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/tbext/source/tbfft1.cpp b/tbext/source/tbfft1.cpp new file mode 100644 index 0000000..8bff178 --- /dev/null +++ b/tbext/source/tbfft1.cpp @@ -0,0 +1,134 @@ +/* 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. */ +/* */ +/* */ +/* tbfft1~ transforms the fft spectrum */ +/* */ +/* tbfft1~ 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: John Zorn / Mike Patton / Ikue Mori: Hemophiliac */ +/* Rashied Ali / Frank Lowe: Duo Exchange */ +/* Keith Rowe / John Tilbury: Duos For Doris */ +/* */ + + + +#include <flext.h> + +#if !defined(FLEXT_VERSION) || (FLEXT_VERSION < 401) +#error upgrade your flext version!!!!!! +#endif + + +class tbfft1: public flext_dsp +{ + FLEXT_HEADER(tbfft1,flext_dsp); + +public: // constructor + tbfft1(); + +protected: + virtual void m_signal (int n, float *const *in, float *const *out); + void set_freq(t_float); + void set_fact(t_float); + +private: + FLEXT_CALLBACK_1(set_freq,t_float) + FLEXT_CALLBACK_1(set_fact,t_float) + + t_int center; + t_float factor; + + t_float pos; + t_int posi; + + float *ins; + float *outs; + + t_float s; + t_float b; + + +}; + + +FLEXT_LIB_DSP("tbfft1~",tbfft1) + +tbfft1::tbfft1() +{ + AddInSignal(); + AddOutSignal(); + FLEXT_ADDMETHOD_F(0,"center",set_freq); + FLEXT_ADDMETHOD_F(0,"factor",set_fact); +} + + +void tbfft1::m_signal(int n, t_float *const *in, t_float *const *out) +{ + ins = in[0]; + outs = out[0]; + + n=n/2+1; + while(n!=0) + { + pos= n + factor * (center-n); + posi=t_int(pos); + + + if (n < t_int(center)) + { + *(outs+n) = ((pos-t_float(posi)) * (*(ins+posi)))/2 + +((1-pos+t_float(posi)) * (*(ins+posi+1)))/2; + } + else + { + *(outs+n) = ((pos-t_float(posi)) * (*(ins+posi-1)))/2 + +((1-pos+t_float(posi)) * (*(ins+posi)))/2; + } + + --n; + } + + +} + +void tbfft1::set_freq(t_float freq) +{ + s=Samplerate(); + + b=Blocksize(); + + center=freq/(s/b); + post("%i",int(center)); +} + + +void tbfft1::set_fact(t_float f) +{ + factor=f; +} |