1 files changed, 117 insertions, 0 deletions
diff --git a/gr-error-correcting-codes/src/lib/libecc/decoder.cc b/gr-error-correcting-codes/src/lib/libecc/decoder.cc
new file mode 100644
index 0000000000..0b77f779eb
--- /dev/null
+++ b/gr-error-correcting-codes/src/lib/libecc/decoder.cc
@@ -0,0 +1,117 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006 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 2, 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <decoder.h>
+#include <assert.h>
+#include <iostream>
+
+#define DO_PRINT_DEBUG 1
+
+#if DO_PRINT_DEBUG
+#include <mld/n2bs.h>
+#endif
+
+/*
+ * decode a certain number of output bits
+ *
+ * the 'in_buf' and 'out_buf' must have enough memory to handle the
+ *     number of input metrics and output bits; no error checking is done!
+ *
+ * n_bits_to_output: the number of bits per output stream to output.
+ *
+ * returns the actual number of metrics used per input stream.
+ */
+
+size_t
+decoder::decode
+(const char** in_buf,
+ char** out_buf,
+ size_t n_bits_to_output)
+{
+  // set the class-internal number of input metrics
+  // and output bits left to decode
+
+  size_t saved_n_input_metrics;
+  saved_n_input_metrics = d_n_input_metrics_left =
+    compute_n_input_metrics (n_bits_to_output);
+  d_n_output_bits_left = n_bits_to_output;
+
+  // call the private decode function
+
+  decode_private (in_buf, out_buf);
+
+  if (DO_PRINT_DEBUG) {
+    std::cout << "n_input_metrics_used = " <<
+      (saved_n_input_metrics - d_n_input_metrics_left) << "\n"
+      "n_output_bits_used = " <<
+      (n_bits_to_output - d_n_output_bits_left) << '\n';
+  }
+
+  // return the actual number of input metrics used
+
+  return (saved_n_input_metrics - d_n_input_metrics_left);
+}
+
+/*
+ * decode a certain number of input metrics
+ *
+ * the 'in_buf' and 'out_buf' must have enough memory to handle the
+ *     number of input metrics and output bits; no error checking is done!
+ *
+ * n_metrics_to_input: the number of metrics per input stream to decode
+ *
+ * returns the actual number of bits written per output stream
+ */
+
+size_t
+decoder::decode
+(const char** in_buf,	
+ size_t n_metrics_to_input,
+ char** out_buf)
+{
+  // set the class-internal number of input metrics and
+  // output bits left to decode
+
+  size_t saved_n_output_bits;
+  saved_n_output_bits = d_n_output_bits_left =
+    compute_n_output_bits (n_metrics_to_input);
+  d_n_input_metrics_left = n_metrics_to_input;
+
+  // call the private decode function
+
+  decode_private (in_buf, out_buf);
+
+  if (DO_PRINT_DEBUG) {
+    std::cout << "n_input_metrics_used = " <<
+      (n_metrics_to_input - d_n_input_metrics_left) << '\n';
+    std::cout << "n_output_bits_used = " <<
+      (saved_n_output_bits - d_n_output_bits_left) << '\n';
+  }
+
+  // return the actual number of output bits written
+
+  return (saved_n_output_bits - d_n_output_bits_left);
+}