1 files changed, 79 insertions, 0 deletions
diff --git a/gr-fec/lib/polar_encoder_systematic.cc b/gr-fec/lib/polar_encoder_systematic.cc
new file mode 100644
index 0000000000..80bfa1ca0c
--- /dev/null
+++ b/gr-fec/lib/polar_encoder_systematic.cc
@@ -0,0 +1,79 @@
+/* -*- c++ -*- */
+/* 
+ * Copyright 2015 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gnuradio/io_signature.h>
+#include <gnuradio/fec/polar_encoder_systematic.h>
+#include <volk/volk.h>
+
+namespace gr {
+  namespace fec {
+    namespace code {
+
+      generic_encoder::sptr
+      polar_encoder_systematic::make(int block_size, int num_info_bits,
+                                     std::vector<int> frozen_bit_positions)
+      {
+        return generic_encoder::sptr(
+            new polar_encoder_systematic(block_size, num_info_bits, frozen_bit_positions));
+      }
+
+      polar_encoder_systematic::polar_encoder_systematic(int block_size, int num_info_bits,
+                                                         std::vector<int> frozen_bit_positions) :
+          polar_common(block_size, num_info_bits, frozen_bit_positions, std::vector<char>())
+      {
+        d_volk_syst_intermediate = (unsigned char*) volk_malloc(sizeof(unsigned char) * block_size, volk_get_alignment());
+      }
+
+      polar_encoder_systematic::~polar_encoder_systematic()
+      {
+        volk_free(d_volk_syst_intermediate);
+      }
+
+      void
+      polar_encoder_systematic::generic_work(void* in_buffer, void* out_buffer)
+      {
+        const unsigned char *in = (const unsigned char*) in_buffer;
+        unsigned char *out = (unsigned char*) out_buffer;
+
+        volk_encode(out, in);
+        bit_reverse_and_reset_frozen_bits(d_volk_syst_intermediate, out);
+        volk_encode_block(out, d_volk_syst_intermediate);
+      }
+
+      void
+      polar_encoder_systematic::bit_reverse_and_reset_frozen_bits(unsigned char* outbuf,
+                                                                  const unsigned char* inbuf)
+      {
+        memset(outbuf, 0, sizeof(unsigned char) * block_size());
+        for(int i = 0; i < num_info_bits(); i++){
+          outbuf[d_info_bit_positions[i]] = inbuf[d_info_bit_positions_reversed[i]];
+        }
+      }
+
+    } /* namespace code */
+  } /* namespace fec */
+} /* namespace gr */
+