From 494a07a361fe4ee0e54f77468a976b1a77818770 Mon Sep 17 00:00:00 2001
From: Tom Schouten <doelie@users.sourceforge.net>
Date: Fri, 12 Sep 2003 22:26:57 +0000
Subject: creb 0.9.0

svn path=/trunk/externals/creb/; revision=956
---
 modules/bitsplit.c | 107 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 modules/bitsplit.c

(limited to 'modules/bitsplit.c')

diff --git a/modules/bitsplit.c b/modules/bitsplit.c
new file mode 100644
index 0000000..9239d0b
--- /dev/null
+++ b/modules/bitsplit.c
@@ -0,0 +1,107 @@
+/*
+ *   bitsplit.c  - convert a signal to a binary vector 
+ *   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>
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+
+#define MAXCHANNELS 24
+
+typedef struct bitsplitctl
+{
+    t_int c_outputs;
+    t_float *c_input;
+    t_float **c_output;
+} t_bitsplitctl;
+
+typedef struct bitsplit
+{
+  t_object x_obj;
+  t_float x_f;
+  t_bitsplitctl x_ctl;
+} t_bitsplit;
+
+
+static t_int *bitsplit_perform(t_int *word)
+{
+
+    t_bitsplitctl *ctl  = (t_bitsplitctl *)(word[1]);
+    t_int n             = (t_int)(word[2]);
+    t_float *in         = ctl->c_input;
+    t_int outputs       = ctl->c_outputs;
+    t_float **out       = ctl->c_output;
+    t_int i,j;
+
+    for (i=0;i<n;i++){
+	long word = (in[i] * (float)(0x7fffffff));
+	for (j=0; j<outputs; j++){
+	    out[j][i] = (float)((word >> 31) & 1);
+	    word <<= 1;
+	}
+    }
+
+    return (word+3);
+}
+
+
+
+static void bitsplit_dsp(t_bitsplit *x, t_signal **sp)
+{
+
+    int i;
+    x->x_ctl.c_input = sp[0]->s_vec;
+    for (i=0;i<x->x_ctl.c_outputs;i++){
+	x->x_ctl.c_output[i] = sp[i+1]->s_vec;
+    }
+    dsp_add(bitsplit_perform, 2, &x->x_ctl, sp[0]->s_n);
+}                                  
+
+
+static void bitsplit_free(t_bitsplit *x)
+{
+    free (x->x_ctl.c_output);
+}
+
+t_class *bitsplit_class;
+
+static void *bitsplit_new(t_floatarg channels)
+{
+    int i = (int)channels;
+    t_bitsplit *x = (t_bitsplit *)pd_new(bitsplit_class);
+
+    if (i<1) i = 1;
+    if (i>MAXCHANNELS) i = MAXCHANNELS;
+    x->x_ctl.c_outputs = i;
+    x->x_ctl.c_output = malloc(sizeof(float)*i);
+
+    while (i--) outlet_new(&x->x_obj, gensym("signal")); 
+
+    return (void *)x;
+}
+
+void bitsplit_tilde_setup(void)
+{
+    bitsplit_class = class_new(gensym("bitsplit~"), (t_newmethod)bitsplit_new,
+    	(t_method)bitsplit_free, sizeof(t_bitsplit), 0, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(bitsplit_class, t_bitsplit, x_f); 
+    class_addmethod(bitsplit_class, (t_method)bitsplit_dsp, gensym("dsp"), 0); 
+}
+
-- 
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