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-rw-r--r--gr-atsc/include/atsc/interleaver_fifo.h86
1 files changed, 86 insertions, 0 deletions
diff --git a/gr-atsc/include/atsc/interleaver_fifo.h b/gr-atsc/include/atsc/interleaver_fifo.h
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+/* -*- 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 <atsc/interleaver_fifo.h>
+#include <string.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_ */