1 files changed, 108 insertions, 0 deletions
diff --git a/gr-aistx/lib/nrz_to_nrzi_impl.cc b/gr-aistx/lib/nrz_to_nrzi_impl.cc
new file mode 100644
index 0000000..98e7e4d
--- /dev/null
+++ b/gr-aistx/lib/nrz_to_nrzi_impl.cc
@@ -0,0 +1,108 @@
+/* -*- c++ -*- */
+/* 
+ * Copyright 2013 <+YOU OR YOUR COMPANY+>.
+ * 
+ * This 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 3, or (at your option)
+ * any later version.
+ * 
+ * This software 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 software; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gr_io_signature.h>
+#include "nrz_to_nrzi_impl.h"
+#include <stdio.h>
+
+namespace gr {
+  namespace AISTX {
+
+    nrz_to_nrzi::sptr
+    nrz_to_nrzi::make()
+    {
+      return gnuradio::get_initial_sptr
+        (new nrz_to_nrzi_impl());
+    }
+
+    /*
+     * The private constructor
+     */
+    nrz_to_nrzi_impl::nrz_to_nrzi_impl()
+      : gr_block("nrz_to_nrzi",
+		      gr_make_io_signature(1, 1, sizeof(unsigned char)),
+		      gr_make_io_signature(1, 1, sizeof(unsigned char)))
+    {}
+
+    /*
+     * Our virtual destructor.
+     */
+    nrz_to_nrzi_impl::~nrz_to_nrzi_impl()
+    {
+    }
+
+    void
+    nrz_to_nrzi_impl::forecast (int noutput_items, gr_vector_int &ninput_items_required)
+    {
+        /* <+forecast+> e.g. ninput_items_required[0] = noutput_items */
+    }
+
+    int
+    nrz_to_nrzi_impl::general_work (int noutput_items,
+                       gr_vector_int &ninput_items,
+                       gr_vector_const_void_star &input_items,
+                       gr_vector_void_star &output_items)
+    {
+        const unsigned char *in = (const unsigned char *) input_items[0];
+        unsigned char *out = (unsigned char *) output_items[0];
+        unsigned char        nrzi_bit;
+        unsigned char        nrz_bit;
+        unsigned char        d_prev_nrzi_bit = 0;
+
+	  	for(int i = 0;i<noutput_items;++i)
+			printf("%d", in[i]);
+	  	printf("\n");	
+
+        for (int i = 0; i < noutput_items; i++)
+        {     
+            nrz_bit = in[i];
+
+            if(nrz_bit == 0)
+              {
+                nrzi_bit = d_prev_nrzi_bit ^ 1;
+              }
+            else
+              {
+                nrzi_bit = d_prev_nrzi_bit;
+              }
+            out[i] = nrzi_bit;
+            d_prev_nrzi_bit = nrzi_bit;
+
+        }
+
+	  	for(int i = 0;i<noutput_items;++i)
+			printf("%d", out[i]);
+	  	printf("\n");	
+
+        // Tell runtime system how many input items we consumed on
+        // each input stream.
+        consume_each (noutput_items);
+
+        // Tell runtime system how many output items we produced.
+        return noutput_items;
+    }
+
+  } /* namespace AISTX */
+} /* namespace gr */
+