From 01314ebc83191b68a8b4b31b7b9efbf531f3b1d9 Mon Sep 17 00:00:00 2001
From: Jamie Bullock <postlude@users.sourceforge.net>
Date: Tue, 10 Jan 2006 11:49:01 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r4382, which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/postlude/; revision=4383
---
 flib/src/hca~.c | 108 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 flib/src/hca~.c

(limited to 'flib/src/hca~.c')

diff --git a/flib/src/hca~.c b/flib/src/hca~.c
new file mode 100644
index 0000000..2317324
--- /dev/null
+++ b/flib/src/hca~.c
@@ -0,0 +1,108 @@
+/* flib - PD library for feature extraction 
+Copyright (C) 2005  Jamie Bullock
+
+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.
+
+This program is distributed in the hope thcat 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 hcave received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
+/* Perform hcarmonic analysis on a signal given the fundamental frequency and the frequency/amplitude spectra */
+
+/* Takes fundamental through right inlet and % allowed deviation from actual harmonic to be considered harmonic as argument. Outputs number of partials, number of harmonics, number of even harmonics  */
+
+#include "flib.h"
+
+static t_class *hca_class;
+
+typedef struct _hca {
+  t_object  x_obj;
+  t_float f;
+  t_float fund, deviation;
+  t_outlet *p_out, *h_out, *e_out;
+} t_hca;
+
+static t_int *hca_perform(t_int *w)
+{
+  t_sample *in = (t_sample *)(w[1]);
+  t_int N = (t_int)(w[2]),n;
+  t_hca *x = (t_hca *)(w[3]);
+  t_int npartials, nharmonics, neven, harmonic;
+  t_float partial, harmonicity;
+  
+  neven = nharmonics = npartials = 0; 
+  
+  while(N--){
+	  if(in[N]){
+		npartials++;
+		partial = in[N] / x->fund;
+		harmonic = (t_int)rintf(partial);
+		if(partial <= harmonic + x->deviation && 
+				partial >= harmonic - x->deviation){
+			nharmonics++;
+			if(harmonic / 2.0f == rint(harmonic / 2.0f))
+				neven++;
+		}
+	  }
+  }
+
+  if(!npartials)
+	  post("hca~: No partials found.");
+  
+  
+  outlet_float(x->p_out, npartials);	
+  outlet_float(x->h_out, nharmonics);	
+  outlet_float(x->e_out, neven);	
+  
+  return (w+4);
+}
+
+static void hca_dsp(t_hca *x, t_signal **sp)
+{
+  dsp_add(hca_perform, 3,
+          sp[0]->s_vec, sp[0]->s_n, x);
+
+}
+
+static void *hca_new(t_floatarg f)
+{
+  t_hca *x = (t_hca *)pd_new(hca_class);
+  if(!f)
+	  x->deviation = 0;
+  else
+	  x->deviation = f * .01;
+  
+  post("deviation = %.2f", x->deviation);
+
+  if(!x->fund)
+	  x->fund = 0;
+  
+  floatinlet_new(&x->x_obj, &x->fund);
+  x->p_out = outlet_new(&x->x_obj, &s_float);
+  x->h_out = outlet_new(&x->x_obj, &s_float);
+  x->e_out = outlet_new(&x->x_obj, &s_float);
+  return (void *)x;
+}
+
+void hca_tilde_setup(void) {
+  hca_class = class_new(gensym("hca~"),
+        (t_newmethod)hca_new,
+        0, sizeof(t_hca),
+        CLASS_DEFAULT, A_DEFFLOAT, 0);
+
+  class_addmethod(hca_class,
+        (t_method)hca_dsp, gensym("dsp"), 0);
+ 
+  CLASS_MAINSIGNALIN(hca_class, t_hca,f);
+  
+  class_sethelpsymbol(hca_class, gensym("help-flib"));
+}
-- 
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