From c56a043c7b42ee7dec7b54790eb16057f97959b2 Mon Sep 17 00:00:00 2001
From: Jamie Bullock <postlude@users.sourceforge.net>
Date: Wed, 19 Apr 2006 18:00:40 +0000
Subject: renamed cross~ to cc~

svn path=/trunk/externals/postlude/; revision=4941
---
 flib/makefile   |  12 ++--
 flib/src/cc~.c  | 199 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 flib/src/flib.c |   4 +-
 flib/src/flib.h |   2 +-
 4 files changed, 208 insertions(+), 9 deletions(-)
 create mode 100644 flib/src/cc~.c

diff --git a/flib/makefile b/flib/makefile
index babda2f..eef602d 100644
--- a/flib/makefile
+++ b/flib/makefile
@@ -12,7 +12,7 @@ INSTALL_PREFIX = /usr/local
 PDLIBDIR = /lib/pd
 PDDIR = $(INSTALL_PREFIX)$(PDLIBDIR)
 
-TARGETS = sc~ ss~ irreg~ mspec~ peak~ pspec~ sfm~ trist~ pp~ bmax~ melf~ clean~ wdv~ hca~ cross~
+TARGETS = sc~ ss~ irreg~ mspec~ peak~ pspec~ sfm~ trist~ pp~ bmax~ melf~ clean~ wdv~ hca~ cc~
 
 
 # ----------------------- NT -----------------------
@@ -53,7 +53,7 @@ PDNTLIB = $(PDNTLDIR)\msvcrt.lib \
 	$(CC) $(PDNTCFLAGS) $(PDNTINCLUDE) -c src/clean~.c
 	$(CC) $(PDNTCFLAGS) $(PDNTINCLUDE) -c src/wdv~.c
 	$(CC) $(PDNTCFLAGS) $(PDNTINCLUDE) -c src/hca~.c
-	$(CC) $(PDNTCFLAGS) $(PDNTINCLUDE) -c src/cross~.c
+	$(CC) $(PDNTCFLAGS) $(PDNTINCLUDE) -c src/cc~.c
 	$(CC) $(PDNTCFLAGS) $(PDNTINCLUDE) /c $*.c
 	link /dll /export:$(CSYM)_setup $(NAME).obj $(PDNTOBJECTS) $(PDNTLIB)
 
@@ -89,7 +89,7 @@ DARWINOBJECTS = $(TARGETS:%=%.o)
 	$(CC) $(DARWINCFLAGS) $(DARWININCLUDE) -c src/clean~.c
 	$(CC) $(DARWINCFLAGS) $(DARWININCLUDE) -c src/wdv~.c
 	$(CC) $(DARWINCFLAGS) $(DARWININCLUDE) -c src/hca~.c
-	$(CC) $(DARWINCFLAGS) $(DARWININCLUDE) -c src/cross~.c
+	$(CC) $(DARWINCFLAGS) $(DARWININCLUDE) -c src/cc~.c
 	$(CC) $(DARWINCFLAGS) $(DARWININCLUDE) -c $*.c 
 	$(CC) -bundle -undefined suppress -flat_namespace -o $(NAME).pd_darwin $(NAME).o $(DARWINOBJECTS)
 	rm -f $(NAME).o ../$(NAME).pd_darwin
@@ -147,7 +147,7 @@ LINUXINCLUDE =  -I/usr/include
 	$(CC) $(LINUXCFLAGS) $(LINUXINCLUDE) -c src/clean~.c
 	$(CC) $(LINUXCFLAGS) $(LINUXINCLUDE) -c src/wdv~.c
 	$(CC) $(LINUXCFLAGS) $(LINUXINCLUDE) -c src/hca~.c
-	$(CC) $(LINUXCFLAGS) $(LINUXINCLUDE) -c src/cross~.c
+	$(CC) $(LINUXCFLAGS) $(LINUXINCLUDE) -c src/cc~.c
 	$(CC) $(LINUXCFLAGS) $(LINUXINCLUDE) -c $*.c
 	ld -export_dynamic  -shared -o $(NAME).pd_linux $(NAME).o $(LINUXOBJECTS) -lc -lm
 	strip --strip-unneeded $(NAME).pd_linux
@@ -179,7 +179,7 @@ SGIINCLUDE =  -I/usr/include/ -I/usr/local/include/
 	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c src/clean~.c
 	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c src/wdv~.c
 	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c src/hca~.c
-	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c src/cross~.c
+	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c src/cc~.c
 	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c $*.c
 	ld -elf -shared -rdata_shared -o $(NAME).pd_irix5 $(NAME).o $(LINUXOBJECTS) -lm -lc
 	rm $*.o
@@ -212,7 +212,7 @@ SGIINCLUDE =  -I/usr/include/ -I/usr/local/include/
 	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c src/clean~.c
 	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c src/wdv~.c
 	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c src/hca~.c
-	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c src/cross~.c
+	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c src/cc~.c
 	$(CC) $(SGICFLAGS) $(SGIINCLUDE) -c $*.c
 	ld -n32 -IPA -shared -rdata_shared -o $*.pd_irix6 $(NAME).o $(LINUXOBJECTS) -lm -lc
 	rm $*.o
diff --git a/flib/src/cc~.c b/flib/src/cc~.c
new file mode 100644
index 0000000..2d06d9b
--- /dev/null
+++ b/flib/src/cc~.c
@@ -0,0 +1,199 @@
+/* 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 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+   */
+
+
+/*Calculate the cross correlation of two signal vectors*/
+
+/*The time domain implementation is based on code by Phil Bourke 
+ * the frequency domain version is based on code by Charles Henry 
+ * 
+ * Specify a time delay as an argument for the time domain implemenation, for example an argument of 32 will give the correlation coefficients  for delays from -32 to 32 samples between the two input vectors
+ *
+ * Specify an argument of 'f' for the frequency domain implementation*/
+
+
+#include "flib.h"
+#define SQ(a) (a * a)
+
+static t_class *cross_class;
+
+typedef struct _cross {
+    t_object  x_obj;
+    t_float f;
+    t_int delay;
+    t_int is_freq_domain;
+} t_cross;
+
+static t_int *cross_perform_time_domain(t_int *w)
+{
+    t_sample *x = (t_sample *)(w[1]);
+    t_sample *y = (t_sample *)(w[2]);
+    t_sample *out = (t_sample *)(w[3]);
+    t_int N = (t_int)(w[4]),
+	  i, j, delay;
+    t_int maxdelay = (t_int)(w[5]);
+    t_float mx, my, sx, sy, sxy, denom, r;
+  
+   if(maxdelay > N * .5){
+	maxdelay = N * .5;
+	post("cross~: invalid maxdelay, must be <= blocksize/2");
+   }
+ 
+/* Calculate the mean of the two series x[], y[] */
+   mx = 0;
+   my = 0;   
+   for (i=0;i<N;i++) {
+      mx += x[i];
+      my += y[i];
+   }
+   mx /= N;
+   my /= N;
+
+   /* Calculate the denominator */
+   sx = 0;
+   sy = 0;
+   for (i=0;i<N;i++) {
+      sx += (x[i] - mx) * (x[i] - mx);
+      sy += (y[i] - my) * (y[i] - my);
+   }
+   denom = sqrt(sx*sy);
+
+   /* Calculate the correlation series */
+   for (delay=-maxdelay;delay<maxdelay;delay++) {
+      sxy = 0;
+      for (i=0;i<N;i++) {
+         j = i + delay;
+
+	/* circular correlation */
+	 while (j < 0)
+            j += N;
+         j %= N;
+         sxy += (x[i] - mx) * (y[j] - my);
+
+     }
+      r = sxy / denom;
+	*out++ = r;
+      /* r is the correlation coefficient at "delay" */
+
+   }
+
+  return (w+6);
+
+}
+
+
+t_int *cross_perform_freq_domain(t_int *w)
+{
+  t_cross *x = (t_cross *)(w[1]);
+
+  t_sample *sig1 = (t_sample *)(w[2]);
+  t_sample *sig2 = (t_sample *)(w[3]);
+  t_sample *out  = (t_sample *)(w[4]);
+  long int size  = (long int) w[5];
+  long int k     = size/2;
+  float *expsig1 = NULL;
+  float *revsig2 = NULL;
+  float temp, temp2;
+  long int i=0;
+  int well_defined=1;
+  int qtr, thrqtr;
+
+// The two signals are created, nonzero on 0 to N/4 and 3N/4 to N
+// This will be revised
+
+  expsig1=(float *) alloca(size*sizeof(float));
+  revsig2=(float *) alloca(size*sizeof(float));
+  qtr = size/4;
+  thrqtr = 3*size/4;
+  for (i=0; i < qtr ; i++)
+  {
+    expsig1[i]=sig1[i];
+    revsig2[i]=0;
+  }
+  for (i=qtr; i < thrqtr ; i++)
+  {
+    expsig1[i]=sig1[i];
+    revsig2[i]=sig2[size-i];
+  }
+  for (i=thrqtr; i < size ; i++)
+  {
+    expsig1[i]=sig1[i];
+    revsig2[i]=0;
+  }
+
+  mayer_realfft(size, expsig1);
+  mayer_realfft(size, revsig2);
+  expsig1[0]*=revsig2[0];
+  expsig1[k]*=revsig2[k];
+  for(i=1; i < k; i++)
+  {
+    temp=expsig1[i];
+    temp2=expsig1[size-i];
+    expsig1[i]=temp*revsig2[i]-temp2*revsig2[size-i];
+    expsig1[size-i]=temp*revsig2[size-i]+temp2*revsig2[i];
+  }
+  
+  mayer_realifft(size, expsig1);
+  for(i=0; i < size; i++)
+  {
+    out[i]=expsig1[i];
+  }
+
+  return(w+6);
+
+}
+
+static void cross_dsp(t_cross *x, t_signal **sp)
+{
+    if(!x->is_freq_domain)
+	dsp_add(cross_perform_time_domain, 5,
+		sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[0]->s_n, x->delay);
+    else
+	dsp_add(cross_perform_freq_domain, 5, x,
+		sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[0]->s_n);
+}
+
+static void *cross_new(t_symbol *s, t_int argc, t_atom *argv)
+{
+    t_cross *x = (t_cross *)pd_new(cross_class);
+
+    if(atom_getsymbol(argv) == gensym("f")){
+	    x->is_freq_domain = 1;
+	    post("flib: cross: Frequency domain selected");
+    }
+    else {
+	x->delay = atom_getfloat(argv);
+	post("flib: cross: Time domain selected");
+    } 
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
+    outlet_new(&x->x_obj, &s_signal);
+    return (void *)x;
+}
+
+
+void cross_tilde_setup(void) {
+    cross_class = class_new(gensym("cross~"),
+	    (t_newmethod)cross_new,
+	    0, sizeof(t_cross),
+	    CLASS_DEFAULT, A_GIMME, 0);
+
+    class_addmethod(cross_class,
+	    (t_method)cross_dsp, gensym("dsp"), 0);
+    CLASS_MAINSIGNALIN(cross_class, t_cross,f);
+    class_sethelpsymbol(cross_class, gensym("help-flib"));
+}
diff --git a/flib/src/flib.c b/flib/src/flib.c
index 8db11f4..1cdcfb0 100644
--- a/flib/src/flib.c
+++ b/flib/src/flib.c
@@ -36,7 +36,7 @@ void flib_setup(void)
 {
 	int i;
 
-	char *ext[] = {"sc~\t\tSpectral Centroid", "ss~\t\tSpectral Smoothness", "irreg~\t\tSpectral Irregularity (methods 1 and 2)", "mspec~\t\tMagnitude Spectrum", "peak~\t\tAmplitude and Frequency of Spectral Peaks", "pspec~\t\tPhase Spectrum", "sfm~\t\tSpectral Flatness Measure", "trist~\t\tTristimulus (x,y,z)", "++~\t\tSum of the samples in each block", "bmax~\t\tThe maximum value and location(s) each block", "melf~\t\tGenerate a mel spaced filter for fft", "clean~\t\tRemoves NaN, inf and -inf from a signal vector", "wdv~\t\tCalculate a wavelet dispersion vector (requires creb)", "hca~\t\tHarmonic component analysis", "cross~\t\tCross correlation"};
+	char *ext[] = {"sc~\t\tSpectral Centroid", "ss~\t\tSpectral Smoothness", "irreg~\t\tSpectral Irregularity (methods 1 and 2)", "mspec~\t\tMagnitude Spectrum", "peak~\t\tAmplitude and Frequency of Spectral Peaks", "pspec~\t\tPhase Spectrum", "sfm~\t\tSpectral Flatness Measure", "trist~\t\tTristimulus (x,y,z)", "++~\t\tSum of the samples in each block", "bmax~\t\tThe maximum value and location(s) each block", "melf~\t\tGenerate a mel spaced filter for fft", "clean~\t\tRemoves NaN, inf and -inf from a signal vector", "wdv~\t\tCalculate a wavelet dispersion vector (requires creb)", "hca~\t\tHarmonic component analysis", "cc~\t\tCross correlation"};
 	sc_tilde_setup();
 	ss_tilde_setup();
 	pp_tilde_setup();
@@ -51,7 +51,7 @@ void flib_setup(void)
 	clean_tilde_setup();
 	wdv_tilde_setup();
 	hca_tilde_setup();
-	cross_tilde_setup();
+	cc_tilde_setup();
    
     post("\n\tflib "VERSION" Feature Extraction Library\n\tby Jamie Bullock\n");
 
diff --git a/flib/src/flib.h b/flib/src/flib.h
index 868f683..c43f63b 100644
--- a/flib/src/flib.h
+++ b/flib/src/flib.h
@@ -37,5 +37,5 @@ void melf_tilde_setup(void);
 void clean_tilde_setup(void);
 void wdv_tilde_setup(void);
 void hca_tilde_setup(void);
-void cross_tilde_setup(void);
+void cc_tilde_setup(void);
 
-- 
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