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-rw-r--r--externals/extra/pique/pique-help.pd33
-rw-r--r--externals/extra/pique/pique.c238
2 files changed, 271 insertions, 0 deletions
diff --git a/externals/extra/pique/pique-help.pd b/externals/extra/pique/pique-help.pd
new file mode 100644
index 00000000..1689c95b
--- /dev/null
+++ b/externals/extra/pique/pique-help.pd
@@ -0,0 +1,33 @@
+#N canvas 143 0 729 407 12;
+#X obj 47 11 pique;
+#X text 105 12 -- find peaks in an FFT spectrum;
+#X obj 214 174 rfft~;
+#X obj 131 129 osc~ 2000;
+#X graph graph2 0 -64 63 64 519 179 719 39;
+#X array fft-real 64 float;
+#X pop;
+#X graph graph3 0 -64 63 64 519 327 719 187;
+#X array fft-imag 64 float;
+#X pop;
+#X obj 214 215 tabwrite~ fft-real;
+#X obj 245 240 tabwrite~ fft-imag;
+#X obj 315 158 metro 1000;
+#X obj 315 116 loadbang;
+#X msg 315 138 1;
+#X obj 91 349 pique;
+#X msg 91 322 64 fft-real fft-imag 10;
+#X obj 91 376 print;
+#X obj 205 132 osc~ 5000;
+#X text 25 37 pique takes unwindowed FFT analyses as input (they should be stored in arrays) and outputs a list of peaks \, giving their peak number \, frequency \, amplitude \, and phase (as a cosine/sine pair.);
+#X text 13 289 message argumnets: number of FFT points \, fft real part \, fft imaginary part \, maximum number of peaks to report.;
+#X text 578 387 updated for Pd 0.31.;
+#X connect 2 0 6 0;
+#X connect 2 1 7 0;
+#X connect 3 0 2 0;
+#X connect 8 0 6 0;
+#X connect 8 0 7 0;
+#X connect 9 0 10 0;
+#X connect 10 0 8 0;
+#X connect 11 0 13 0;
+#X connect 12 0 11 0;
+#X connect 14 0 2 0;
diff --git a/externals/extra/pique/pique.c b/externals/extra/pique/pique.c
new file mode 100644
index 00000000..f4cae5e1
--- /dev/null
+++ b/externals/extra/pique/pique.c
@@ -0,0 +1,238 @@
+/* Copyright (c) 1999 Miller Puckette. The
+contents of this file are free for any use, but BOTH THE AUTHOR AND UCSD
+DISCLAIM ALL WARRANTIES related to it. Although not written in Java, this
+still should not be used to control any machinery containing a sharp blade or
+combustible materiel, or as part of any life support system or weapon. */
+
+#include "m_pd.h"
+#include <math.h>
+#include <stdio.h>
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+static t_class *pique_class;
+
+typedef struct _pique
+{
+ t_object x_obj;
+ int x_n;
+ float x_errthresh;
+ float *x_freq;
+ float *x_amp;
+ float *x_ampre;
+ float *x_ampim;
+} t_pique;
+
+static void *pique_new(t_floatarg f)
+{
+ int n = f;
+ t_pique *x = (t_pique *)pd_new(pique_class);
+ if (n < 1) n = 100;
+ x->x_n = n;
+ x->x_errthresh = 0;
+ x->x_freq = t_getbytes(n * sizeof(*x->x_freq));
+ x->x_amp = t_getbytes(n * sizeof(*x->x_amp));
+ x->x_ampre = t_getbytes(n * sizeof(*x->x_ampre));
+ x->x_ampim = t_getbytes(n * sizeof(*x->x_ampim));
+ outlet_new(&x->x_obj, &s_list);
+ return (x);
+}
+
+static float hanning(float pidetune, float sinpidetune)
+{
+ float pi = 3.14159;
+ if (pidetune < 0.01 && pidetune > -0.01) return (1);
+ else if (pidetune > 3.14 && pidetune < 3.143) return (0.5);
+ else if (pidetune < -3.14 && pidetune > -3.143) return (0.5);
+ else return (sinpidetune/pidetune - 0.5 *
+ (sinpidetune/(pidetune+pi) + sinpidetune/(pidetune-pi)));
+}
+
+static float peakerror(float *fpreal, float *fpimag, float pidetune,
+ float norm, float peakreal, float peakimag)
+{
+ float sinpidetune = sin(pidetune);
+ float cospidetune = cos(pidetune);
+ float windowshould = hanning(pidetune, sinpidetune);
+ float realshould = windowshould * (
+ peakreal * cospidetune + peakimag * sinpidetune);
+ float imagshould = windowshould * (
+ peakimag * cospidetune - peakreal * sinpidetune);
+ float realgot = norm * (fpreal[0] - 0.5 * (fpreal[1] + fpreal[-1]));
+ float imaggot = norm * (fpimag[0] - 0.5 * (fpimag[1] + fpimag[-1]));
+ float realdev = realshould - realgot, imagdev = imagshould - imaggot;
+
+ /* post("real %f->%f; imag %f->%f", realshould, realgot,
+ imagshould, imaggot); */
+ return (realdev * realdev + imagdev * imagdev);
+}
+
+static void pique_doit(int npts, t_float *fpreal, t_float *fpimag,
+ int npeak, int *nfound, t_float *fpfreq, t_float *fpamp,
+ t_float *fpampre, t_float *fpampim, float errthresh)
+{
+ float srate = sys_getsr(); /* not sure how to get this correctly */
+ float oneovern = 1.0/ (float)npts;
+ float fperbin = srate * oneovern;
+ float pow1, pow2 = 0, pow3 = 0, pow4 = 0, pow5 = 0;
+ float re1, re2 = 0, re3 = *fpreal;
+ float im1, im2 = 0, im3 = 0, powthresh, relativeerror;
+ int count, peakcount = 0, n2 = (npts >> 1);
+ float *fp1, *fp2;
+ for (count = n2, fp1 = fpreal, fp2 = fpimag, powthresh = 0;
+ count--; fp1++, fp2++)
+ powthresh += (*fp1) * (*fp1) + (*fp2) * (*fp2) ;
+ powthresh *= 0.00001;
+ for (count = 1; count < n2; count++)
+ {
+ float windreal, windimag, pi = 3.14159;
+ float detune, pidetune, sinpidetune, cospidetune,
+ ampcorrect, freqout, ampout, ampoutreal, ampoutimag;
+ float rpeak, rpeaknext, rpeakprev;
+ float ipeak, ipeaknext, ipeakprev;
+ float errleft, errright;
+ fpreal++;
+ fpimag++;
+ re1 = re2;
+ re2 = re3;
+ re3 = *fpreal;
+ im1 = im2;
+ im2 = im3;
+ im3 = *fpimag;
+ if (count < 2) continue;
+ pow1 = pow2;
+ pow2 = pow3;
+ pow3 = pow4;
+ pow4 = pow5;
+ /* get Hanning-windowed spectrum by convolution */
+ windreal = re2 - 0.5 * (re1 + re3);
+ windimag = im2 - 0.5 * (im1 + im3);
+ pow5 = windreal * windreal + windimag * windimag;
+ /* if (count < 30) post("power %f", pow5); */
+ if (count < 5) continue;
+ /* check for a peak. The actual bin is count-3. */
+ if (pow3 <= pow2 || pow3 <= pow4 || pow3 <= pow1 || pow3 <= pow5
+ || pow3 < powthresh)
+ continue;
+ /* go back for the raw FFT values around the peak. */
+ rpeak = fpreal[-3];
+ rpeaknext = fpreal[-2];
+ rpeakprev = fpreal[-4];
+ ipeak = fpimag[-3];
+ ipeaknext = fpimag[-2];
+ ipeakprev = fpimag[-4];
+ /* recalculate Hanning-windowed spectrum by convolution */
+ windreal = rpeak - 0.5 * (rpeaknext + rpeakprev);
+ windimag = ipeak - 0.5 * (ipeaknext + ipeakprev);
+
+ detune = ((rpeakprev - rpeaknext) *
+ (2.0 * rpeak - rpeakprev - rpeaknext) +
+ (ipeakprev - ipeaknext) *
+ (2.0 * ipeak - ipeakprev - ipeaknext)) /
+ (4.0 * pow3);
+ /* if (count < 30) post("detune %f", detune); */
+ if (detune > 0.7 || detune < -0.7) continue;
+ /* the frequency is the sum of the bin frequency and detuning */
+ freqout = fperbin * ((float)(count-3) + detune);
+ pidetune = pi * detune;
+ sinpidetune = sin(pidetune);
+ cospidetune = cos(pidetune);
+ ampcorrect = 1.0 / hanning(pidetune, sinpidetune);
+ /* Multiply by 2 to get real-sinusoid peak amplitude
+ and divide by N to normalize FFT */
+ ampcorrect *= 2. * oneovern;
+ /* amplitude is peak height, corrected for Hanning window shape */
+
+ ampout = ampcorrect * sqrt(pow3);
+ ampoutreal = ampcorrect *
+ (windreal * cospidetune - windimag * sinpidetune);
+ ampoutimag = ampcorrect *
+ (windreal * sinpidetune + windimag * cospidetune);
+ if (errthresh > 0)
+ {
+ /* post("peak %f %f", freqout, ampout); */
+ errleft = peakerror(fpreal-4, fpimag-4, pidetune+pi,
+ 2. * oneovern, ampoutreal, ampoutimag);
+ errright = peakerror(fpreal-2, fpimag-2, pidetune-pi,
+ 2. * oneovern, ampoutreal, ampoutimag);
+ relativeerror = (errleft + errright)/(ampout * ampout);
+ if (relativeerror > errthresh) continue;
+ }
+ /* post("power %f, error %f, relative %f",
+ pow3, errleft + errright, relativeerror); */
+ *fpfreq++ = freqout;
+ *fpamp++ = ampout;
+ *fpampre++ = ampoutreal;
+ *fpampim++ = ampoutimag;
+ if (++peakcount == npeak) break;
+ }
+ *nfound = peakcount;
+}
+
+static void pique_list(t_pique *x, t_symbol *s, int argc, t_atom *argv)
+{
+ int npts = atom_getintarg(0, argc, argv);
+ t_symbol *symreal = atom_getsymbolarg(1, argc, argv);
+ t_symbol *symimag = atom_getsymbolarg(2, argc, argv);
+ int npeak = atom_getintarg(3, argc, argv);
+ int n;
+ t_garray *a;
+ t_float *fpreal, *fpimag;
+ if (npts < 8 || npeak < 1) error("pique: bad npoints or npeak");
+ if (npeak > x->x_n) npeak = x->x_n;
+ if (!(a = (t_garray *)pd_findbyclass(symreal, garray_class)) ||
+ !garray_getfloatarray(a, &n, &fpreal) ||
+ n < npts)
+ error("%s: missing or bad array", symreal->s_name);
+ else if (!(a = (t_garray *)pd_findbyclass(symimag, garray_class)) ||
+ !garray_getfloatarray(a, &n, &fpimag) ||
+ n < npts)
+ error("%s: missing or bad array", symimag->s_name);
+ else
+ {
+ int nfound, i;
+ float *fpfreq = x->x_freq;
+ float *fpamp = x->x_amp;
+ float *fpampre = x->x_ampre;
+ float *fpampim = x->x_ampim;
+ pique_doit(npts, fpreal, fpimag, npeak,
+ &nfound, fpfreq, fpamp, fpampre, fpampim, x->x_errthresh);
+ for (i = 0; i < nfound; i++, fpamp++, fpfreq++, fpampre++, fpampim++)
+ {
+ t_atom at[5];
+ SETFLOAT(at, (float)i);
+ SETFLOAT(at+1, *fpfreq);
+ SETFLOAT(at+2, *fpamp);
+ SETFLOAT(at+3, *fpampre);
+ SETFLOAT(at+4, *fpampim);
+ outlet_list(x->x_obj.ob_outlet, &s_list, 5, at);
+ }
+ }
+}
+
+static void pique_errthresh(t_pique *x, t_floatarg f)
+{
+ x->x_errthresh = f;
+}
+
+static void pique_free(t_pique *x)
+{
+ int n = x->x_n;
+ t_freebytes(x->x_freq, n * sizeof(*x->x_freq));
+ t_freebytes(x->x_amp, n * sizeof(*x->x_amp));
+ t_freebytes(x->x_ampre, n * sizeof(*x->x_ampre));
+ t_freebytes(x->x_ampim, n * sizeof(*x->x_ampim));
+}
+
+void pique_setup(void)
+{
+ pique_class = class_new(gensym("pique"), (t_newmethod)pique_new,
+ (t_method)pique_free, sizeof(t_pique),0, A_DEFFLOAT, 0);
+ class_addlist(pique_class, pique_list);
+ class_addmethod(pique_class, (t_method)pique_errthresh,
+ gensym("errthresh"), A_FLOAT, 0);
+ post("pique 0.1 for PD version 23");
+}
+
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