This commit was generated by cvs2svn to compensate for changes in r1738,svn2git-root

which included commits to RCS files with non-trunk default branches.

svn path=/trunk/externals/iemlib/; revision=1739

1 files changed, 143 insertions, 0 deletions

diff --git a/src/iemlib1/sigmov_avrg_kern.c b/src/iemlib1/sigmov_avrg_kern.c
new file mode 100644
index 0000000..1c77a49
--- /dev/null
+++ b/src/iemlib1/sigmov_avrg_kern.c
@@ -0,0 +1,143 @@
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iemlib1 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2003 */
+
+#ifdef NT
+#pragma warning( disable : 4244 )
+#pragma warning( disable : 4305 )
+#endif
+
+
+#include "m_pd.h"
+#include "iemlib.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+
+/* -- mov_avrg_kern~ - kernel for a moving-average-filter with IIR - */
+
+typedef struct sigmov_avrg_kern
+{
+    t_object x_obj;
+    double   x_wn1;
+    double   x_a0;
+    double   x_sr;
+    double   x_mstime;
+    int      x_nsamps;
+    int      x_counter;
+    float    x_msi;
+} t_sigmov_avrg_kern;
+
+t_class *sigmov_avrg_kern_class;
+
+static t_int *sigmov_avrg_kern_perform(t_int *w)
+{
+    float *in_direct = (float *)(w[1]);
+    float *in_delayed = (float *)(w[2]);
+    float *out = (float *)(w[3]);
+    t_sigmov_avrg_kern *x = (t_sigmov_avrg_kern *)(w[4]);
+    int i, n = (int)(w[5]);
+    double wn0, wn1=x->x_wn1, a0=x->x_a0;
+
+    if(x->x_counter)
+    {
+	int counter = x->x_counter;
+
+	if(counter >= n)
+	{
+	    x->x_counter = counter - n;
+	    for(i=0; i<n; i++)
+	    {
+		wn0 = wn1 + a0*(double)(*in_direct++);
+		*out++ = (float)wn0;
+                wn1 = wn0;
+	    }
+	}
+	else
+	{
+	    x->x_counter = 0;
+            for(i=0; i<counter; i++)
+	    {
+                wn0 = wn1 + a0*(double)(*in_direct++);
+		*out++ = (float)wn0;
+                wn1 = wn0;
+	    }
+	    for(i=counter; i<n; i++)
+	    {
+                wn0 = wn1 + a0*(double)(*in_direct++ - *in_delayed++);
+		*out++ = (float)wn0;
+                wn1 = wn0;
+	    }
+	}
+    }
+    else
+    {
+	for(i=0; i<n; i++)
+	{
+	    wn0 = wn1 + a0*(double)(*in_direct++ - *in_delayed++);
+	    *out++ = (float)wn0;
+	    wn1 = wn0;
+	}
+    }
+    x->x_wn1 = wn1;
+    return(w+6);
+}
+
+static void sigmov_avrg_kern_ft1(t_sigmov_avrg_kern *x, t_floatarg mstime)
+{
+    if(mstime < 0.04)
+	mstime = 0.04;
+    x->x_mstime = (double)mstime;
+    x->x_nsamps = (int)(x->x_sr * x->x_mstime);
+    x->x_counter = x->x_nsamps;
+    x->x_wn1 = 0.0;
+    x->x_a0 = 1.0/(double)(x->x_nsamps);
+}
+
+static void sigmov_avrg_kern_reset(t_sigmov_avrg_kern *x)
+{
+    x->x_counter = x->x_nsamps;
+    x->x_wn1 = 0.0;
+}
+
+static void sigmov_avrg_kern_dsp(t_sigmov_avrg_kern *x, t_signal **sp)
+{
+    x->x_sr = 0.001*(double)(sp[0]->s_sr);
+    x->x_nsamps = (int)(x->x_sr * x->x_mstime);
+    x->x_counter = x->x_nsamps;
+    x->x_wn1 = 0.0;
+    x->x_a0 = 1.0/(double)(x->x_nsamps);
+    dsp_add(sigmov_avrg_kern_perform, 5, sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, x, sp[0]->s_n);
+}
+
+static void *sigmov_avrg_kern_new(t_floatarg mstime)
+{
+    t_sigmov_avrg_kern *x = (t_sigmov_avrg_kern *)pd_new(sigmov_avrg_kern_class);
+
+    if(mstime < 0.04)
+	mstime = 0.04;
+    x->x_mstime = (double)mstime;
+    x->x_sr = 44.1;
+    x->x_nsamps = (int)(x->x_sr * x->x_mstime);
+    x->x_counter = x->x_nsamps;
+    x->x_wn1 = 0.0;
+    x->x_a0 = 1.0/(double)(x->x_nsamps);
+
+    inlet_new(&x->x_obj,  &x->x_obj.ob_pd, &s_signal, &s_signal);
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
+    outlet_new(&x->x_obj, &s_signal);
+    x->x_msi = 0;
+    return(x);
+}
+
+void sigmov_avrg_kern_setup(void)
+{
+    sigmov_avrg_kern_class = class_new(gensym("mov_avrg_kern~"), (t_newmethod)sigmov_avrg_kern_new,
+				0, sizeof(t_sigmov_avrg_kern), 0, A_FLOAT, 0);
+    CLASS_MAINSIGNALIN(sigmov_avrg_kern_class, t_sigmov_avrg_kern, x_msi);
+    class_addmethod(sigmov_avrg_kern_class, (t_method)sigmov_avrg_kern_dsp, gensym("dsp"), 0);
+    class_addmethod(sigmov_avrg_kern_class, (t_method)sigmov_avrg_kern_ft1, gensym("ft1"), A_FLOAT, 0);
+    class_addmethod(sigmov_avrg_kern_class, (t_method)sigmov_avrg_kern_reset, gensym("reset"), 0);
+}