split out d_math.c into standalone objects

svn path=/trunk/; revision=12736

1 files changed, 52 insertions, 0 deletions

diff --git a/externals/vanilla/mtof~.c b/externals/vanilla/mtof~.c
new file mode 100644
index 00000000..f8fc7de6
--- /dev/null
+++ b/externals/vanilla/mtof~.c
@@ -0,0 +1,52 @@
+/* Copyright (c) 1997-2001 Miller Puckette and others.
+* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+#include "m_pd.h"
+#include <math.h>
+
+typedef struct mtof_tilde
+{
+    t_object x_obj;
+    t_float x_f;
+} t_mtof_tilde;
+
+t_class *mtof_tilde_class;
+
+static void *mtof_tilde_new(void)
+{
+    t_mtof_tilde *x = (t_mtof_tilde *)pd_new(mtof_tilde_class);
+    outlet_new(&x->x_obj, gensym("signal"));
+    x->x_f = 0;
+    return (x);
+}
+
+static t_int *mtof_tilde_perform(t_int *w)
+{
+    t_sample *in = *(t_sample **)(w+1), *out = *(t_sample **)(w+2);
+    t_int n = *(t_int *)(w+3);
+    for (; n--; in++, out++)
+    {
+        t_sample f = *in;
+        if (f <= -1500) *out = 0;
+        else
+        {
+            if (f > 1499) f = 1499;
+            *out = 8.17579891564 * exp(.0577622650 * f);
+        }
+    }
+    return (w + 4);
+}
+
+static void mtof_tilde_dsp(t_mtof_tilde *x, t_signal **sp)
+{
+    dsp_add(mtof_tilde_perform, 3, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+void mtof_tilde_setup(void)
+{
+    mtof_tilde_class = class_new(gensym("mtof~"), (t_newmethod)mtof_tilde_new, 0,
+        sizeof(t_mtof_tilde), 0, 0);
+    CLASS_MAINSIGNALIN(mtof_tilde_class, t_mtof_tilde, x_f);
+    class_addmethod(mtof_tilde_class, (t_method)mtof_tilde_dsp, gensym("dsp"), 0);
+}