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-rw-r--r--tbext/source/tbfft1.cpp134
1 files changed, 134 insertions, 0 deletions
diff --git a/tbext/source/tbfft1.cpp b/tbext/source/tbfft1.cpp
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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. */
+/* */
+/* */
+/* 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;
+}