/* -*- c++ -*- */

/*

 * Copyright 2004 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., 51 Franklin Street,

 * Boston, MA 02110-1301, USA.

 */

#ifndef INCLUDED_GR_KEEP_ONE_IN_N_H

#define INCLUDED_GR_KEEP_ONE_IN_N_H

#include <gr_sync_decimator.h>

class gr_keep_one_in_n;

typedef boost::shared_ptr<gr_keep_one_in_n> gr_keep_one_in_n_sptr;

gr_keep_one_in_n_sptr 

gr_make_keep_one_in_n (size_t item_size, int n);

/*!

 * \brief decimate a stream, keeping one item out of every n.

 * \ingroup block

 */

class gr_keep_one_in_n : public gr_block

{

  friend gr_keep_one_in_n_sptr

  gr_make_keep_one_in_n (size_t item_size, int n);

  int        d_n;

  int        d_count;

 protected:

  gr_keep_one_in_n (size_t item_size, int n);

 public:

  int general_work (int noutput_items,

                    gr_vector_int &ninput_items,

                    gr_vector_const_void_star &input_items,

                    gr_vector_void_star &output_items);

  void set_n(int n);

};

#endif /* INCLUDED_GR_KEEP_ONE_IN_N_H */