Added missing Viterbi decoder source
diff --git a/lib/decoding/Viterbi.h b/lib/decoding/Viterbi.h
new file mode 100644
index 0000000..8635bf5
--- /dev/null
+++ b/lib/decoding/Viterbi.h
@@ -0,0 +1,35 @@
+/*
+* Copyright 2013, 2014 Range Networks, Inc.
+*
+* This software is distributed under multiple licenses;
+* see the COPYING file in the main directory for licensing
+* information for this specific distribution.
+*
+* This use of this software may be subject to additional restrictions.
+* See the LEGAL file in the main directory for details.
+
+ 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.
+
+*/
+
+
+#ifndef _VITERBI_H_
+#define _VITERBI_H_ 1
+
+// (pat) Virtual base class for Viterbi and Turbo coder/decoders.
+class ViterbiBase {
+ public:
+ virtual void encode(const BitVector &in, BitVector& target) const = 0;
+ virtual void decode(const SoftVector &in, BitVector& target) = 0;
+ // (pat) Return error count from most recent decoder run.
+ // If you get -1 from this, the method is not defined in the Viterbi class.
+ virtual int getBEC() { return -1; }
+ //virtual ~ViterbiBase(); Currently None of these have destructors.
+
+ // These functions are logically part of the Viterbi functionality, even though they do not use any class variables.
+ unsigned applyPoly(uint64_t val, uint64_t poly);
+ unsigned applyPoly(uint64_t val, uint64_t poly, unsigned order);
+};
+#endif