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-rw-r--r--modules/abs.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/modules/abs.c b/modules/abs.c
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+/*
+ * abs.c - computes absolute value of a signal
+ * Copyright (c) 2000-2003 by Tom Schouten
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "m_pd.h"
+#include <math.h>
+
+/* ------------------------- abs~ -------------------------- */
+static t_class *abs_class;
+
+typedef struct _abs
+{
+ t_object x_obj;
+} t_abs;
+
+static t_int *abs_perform(t_int *w)
+{
+ t_abs *x = (t_abs *)(w[1]);
+ t_float *in = (t_float *)(w[2]);
+ t_float *out = (t_float *)(w[3]);
+ int n = (int)(w[4]);
+ while (n--)
+ {
+ float f = *in++;
+ if (f < 0) f = -f;
+ *out++ = f;
+ }
+ return (w+5);
+}
+
+static void abs_dsp(t_abs *x, t_signal **sp)
+{
+ dsp_add(abs_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+static void *abs_new(void)
+{
+ t_abs *x = (t_abs *)pd_new(abs_class);
+ outlet_new(&x->x_obj, &s_signal);
+ return (x);
+}
+
+void abs_tilde_setup(void)
+{
+ abs_class = class_new(gensym("abs~"), (t_newmethod)abs_new, 0,
+ sizeof(t_abs), 0, A_NULL);
+ class_addmethod(abs_class, (t_method)nullfn, &s_signal, A_NULL);
+ class_addmethod(abs_class, (t_method)abs_dsp, gensym("dsp"), A_NULL);
+}