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, 86 insertions, 0 deletions

diff --git a/src/iemlib1/sigiem_pow4.c b/src/iemlib1/sigiem_pow4.c
new file mode 100644
index 0000000..ae5334c
--- /dev/null
+++ b/src/iemlib1/sigiem_pow4.c
@@ -0,0 +1,86 @@
+/* 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>
+
+/* ------------------------ iem_pow4~ ----------------------------- */
+
+static t_class *sigiem_pow4_class;
+
+typedef struct _sigiem_pow4
+{
+	t_object x_obj;
+	float x_exp;
+	float x_msi;
+} t_sigiem_pow4;
+
+static void sigiem_pow4_ft1(t_sigiem_pow4 *x, t_floatarg f)
+{
+	x->x_exp = f;
+}
+
+static t_int *sigiem_pow4_perform(t_int *w)
+{
+	t_float *in = (t_float *)(w[1]);
+	t_float *out = (t_float *)(w[2]);
+	t_sigiem_pow4 *x = (t_sigiem_pow4 *)(w[3]);
+	t_float y=x->x_exp;
+	t_float f, g;
+	int n = (int)(w[4])/4;
+	
+	while (n--)
+	{
+		f = *in;
+		if(f < 0.01f)
+			f = 0.01f;
+		else if(f > 1000.0f)
+			f = 1000.0f;
+		g = log(f);
+		f = exp(g*y);
+		*out++ = f;
+		*out++ = f;
+		*out++ = f;
+		*out++ = f;
+		in += 4;
+	}
+	return (w+5);
+}
+
+static void sigiem_pow4_dsp(t_sigiem_pow4 *x, t_signal **sp)
+{
+	dsp_add(sigiem_pow4_perform, 4, sp[0]->s_vec, sp[1]->s_vec, x, sp[0]->s_n);
+}
+
+static void *sigiem_pow4_new(t_floatarg f)
+{
+	t_sigiem_pow4 *x = (t_sigiem_pow4 *)pd_new(sigiem_pow4_class);
+
+	x->x_exp = f;
+	inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
+	outlet_new(&x->x_obj, gensym("signal"));
+	x->x_msi = 0;
+	return (x);
+}
+
+void sigiem_pow4_setup(void)
+{
+	sigiem_pow4_class = class_new(gensym("iem_pow4~"), (t_newmethod)sigiem_pow4_new, 0,
+				 sizeof(t_sigiem_pow4), 0, A_DEFFLOAT, 0);
+	class_addcreator((t_newmethod)sigiem_pow4_new, gensym("icot~"), 0);
+	CLASS_MAINSIGNALIN(sigiem_pow4_class, t_sigiem_pow4, x_msi);
+	class_addmethod(sigiem_pow4_class, (t_method)sigiem_pow4_dsp, gensym("dsp"), 0);
+	class_addmethod(sigiem_pow4_class, (t_method)sigiem_pow4_ft1, gensym("ft1"), A_FLOAT, 0);
+	class_sethelpsymbol(sigiem_pow4_class, gensym("iemhelp/help-iem_pow4~"));
+}