1 files changed, 84 insertions, 0 deletions
diff --git a/blocks/src/lib/tdu.cc b/blocks/src/lib/tdu.cc
new file mode 100644
index 0000000..e5cfdde
--- /dev/null
+++ b/blocks/src/lib/tdu.cc
@@ -0,0 +1,84 @@
+/* -*- C++ -*- */
+
+/*
+ * Copyright 2008 Steve Glass
+ * 
+ * This file is part of OP25.
+ * 
+ * OP25 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.
+ * 
+ * OP25 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 OP25; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <itpp/base/vec.h>
+#include <itpp/comm/reedsolomon.h>
+#include <tdu.h>
+#include <op25_yank.h>
+
+using std::string;
+
+tdu::tdu(const_bit_queue& frame_body, bool has_link_control) :
+   abstract_data_unit(frame_body),
+   d_has_link_control(has_link_control)
+{
+}
+
+tdu::~tdu()
+{
+}
+
+string
+tdu::duid_str() const
+{
+   return string("TDU");
+}
+
+void
+tdu::do_correct_errors(bit_vector& frame)
+{
+   if(d_has_link_control) {
+      apply_golay_correction(frame);
+      apply_rs_correction(frame);
+   }
+}
+
+void
+tdu::apply_golay_correction(bit_vector& frame)
+{
+}
+
+void
+tdu::apply_rs_correction(bit_vector& frame)
+{
+#if 0
+   static itpp::Reed_Solomon rs(63, 17, true);
+   itpp::bvec b(70);
+   swab(frame, 114, 122, b,  0);
+   swab(frame, 122, 126, b,  8);
+   swab(frame, 138, 142, b, 12);
+   swab(frame, 144, 152, b, 16);
+   swab(frame, 164, 176, b, 24);
+   swab(frame, 188, 200, b, 36);
+   swab(frame, 212, 213, b, 48);
+   swab(frame, 216, 226, b, 50);
+   swab(frame, 238, 250, b, 60);
+   itpp::bvec bd(rs.decode(b));
+#endif
+}
+
+uint16_t
+tdu::frame_size_max() const
+{
+   return d_has_link_control ? 432 : 144;
+}