diff options
Diffstat (limited to 'gr-atsc/include/atsc/interleaver_fifo.h')
-rw-r--r-- | gr-atsc/include/atsc/interleaver_fifo.h | 86 |
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 new file mode 100644 index 0000000000..5c29a82563 --- /dev/null +++ b/gr-atsc/include/atsc/interleaver_fifo.h @@ -0,0 +1,86 @@ +/* -*- 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_ */ |