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diff --git a/gr-trellis/lib/pccc_encoder_impl.h b/gr-trellis/lib/pccc_encoder_impl.h
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+++ b/gr-trellis/lib/pccc_encoder_impl.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2018 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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.
+ *
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef PCCC_ENCODER_IMPL_H
+#define PCCC_ENCODER_IMPL_H
+
+#include <gnuradio/trellis/pccc_encoder.h>
+
+namespace gr {
+  namespace trellis {
+
+    template <class IN_T, class OUT_T>
+    class pccc_encoder_impl : public pccc_encoder<IN_T,OUT_T>
+    {
+    private:
+      fsm d_FSM1;
+      int d_ST1;
+      fsm d_FSM2;
+      int d_ST2;
+      interleaver d_INTERLEAVER;
+      int d_blocklength;
+      std::vector<int> d_buffer;
+
+    public:
+      pccc_encoder_impl(const fsm &FSM1, int ST1,
+		  const fsm &FSM2, int ST2,
+		  const interleaver &INTERLEAVER,
+		  int blocklength);
+      ~pccc_encoder_impl();
+
+      fsm FSM1() const { return d_FSM1; }
+      int ST1() const { return d_ST1; }
+      fsm FSM2() const { return d_FSM2; }
+      int ST2() const { return d_ST2; }
+      interleaver INTERLEAVER() const { return d_INTERLEAVER; }
+      int blocklength() const { return d_blocklength; }
+
+      int work(int noutput_items,
+	       gr_vector_const_void_star &input_items,
+	       gr_vector_void_star &output_items);
+    };
+
+  } /* namespace trellis */
+} /* namespace gr */
+
+#endif /* PCCC_ENCODER_IMPL_H */