Merge branch 'upstream' into dfsg-orig

[debian/gnuradio] / gr-atsc / src / lib / interleaver_fifo.h

diff --git a/gr-atsc/src/lib/interleaver_fifo.h b/gr-atsc/src/lib/interleaver_fifo.h
new file mode 100644 (file)
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--- /dev/null
+++ b/gr-atsc/src/lib/interleaver_fifo.h
@@ -0,0 +1,87 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2002 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 _INTERLEAVER_FIFO_H_
+#define _INTERLEAVER_FIFO_H_
+
+
+#include <interleaver_fifo.h>
+#include <string.h>
+#include <strings.h>
+
+/*!
+ * \brief template class for interleaver fifo
+ */
+
+template<class symbol_type>
+class interleaver_fifo {
+ public:
+
+  interleaver_fifo (unsigned int size);
+  ~interleaver_fifo ();
+
+  //! reset interleaver (flushes contents and resets commutator)
+  void reset ();
+  
+  //! stuff a symbol into the fifo and return the oldest
+  symbol_type stuff (symbol_type input){
+    if (m_size == 0)
+      return input;
+
+    symbol_type retval = m_fifo[m_position];
+    m_fifo[m_position] = input;
+    m_position++;
+    if (m_position >= m_size)
+      m_position = 0;
+
+    return retval;
+  }
+
+protected:
+  unsigned int m_size;
+  unsigned int m_position;
+  symbol_type  *m_fifo;
+};
+
+template<class symbol_type>
+interleaver_fifo<symbol_type>::interleaver_fifo (unsigned int size)
+{
+  m_size = size;
+  m_position = 0;
+  m_fifo = new symbol_type[size];
+  memset (m_fifo, 0, m_size * sizeof (symbol_type));
+}
+
+template<class symbol_type>
+interleaver_fifo<symbol_type>::~interleaver_fifo ()
+{
+  delete [] m_fifo;
+}
+
+template<class symbol_type> void
+interleaver_fifo<symbol_type>::reset ()
+{
+  m_position = 0;
+  memset (m_fifo, 0, m_size * sizeof (symbol_type));
+}
+
+#endif /* _INTERLEAVER_FIFO_H_ */