diff options
Diffstat (limited to 'externals/signal/pique')
| -rw-r--r-- | externals/signal/pique/pique-help.pd | 33 | ||||
| -rw-r--r-- | externals/signal/pique/pique.c | 238 |
2 files changed, 0 insertions, 271 deletions
diff --git a/externals/signal/pique/pique-help.pd b/externals/signal/pique/pique-help.pd deleted file mode 100644 index d3f7d0bd..00000000 --- a/externals/signal/pique/pique-help.pd +++ /dev/null @@ -1,33 +0,0 @@ -#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/signal/pique/pique.c b/externals/signal/pique/pique.c deleted file mode 100644 index 7770ddd6..00000000 --- a/externals/signal/pique/pique.c +++ /dev/null @@ -1,238 +0,0 @@ -/* 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");
-}
-
|