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authorHans-Christoph Steiner <eighthave@users.sourceforge.net>2004-05-18 21:33:33 +0000
committerHans-Christoph Steiner <eighthave@users.sourceforge.net>2004-05-18 21:33:33 +0000
commit577ac6e80ff4f436fbd054291ed7dddbc31bd49a (patch)
tree6ec69b216dda68d7de38a5eba1851b9d4f1431e6 /src/iemlib1/sigiem_pow4.c
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
Diffstat (limited to 'src/iemlib1/sigiem_pow4.c')
-rw-r--r--src/iemlib1/sigiem_pow4.c86
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~"));
+}