/* -*- 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 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 INCLUDED_GR_THRESHOLD_FF_H

#define INCLUDED_GR_THRESHOLD_FF_H

#include <gr_sync_block.h>

class gr_threshold_ff;

typedef boost::shared_ptr<gr_threshold_ff> gr_threshold_ff_sptr;

gr_threshold_ff_sptr gr_make_threshold_ff (float lo, float hi, float initial_state=0);

/*!

 * \brief Please fix my documentation

 * \ingroup misc

 */

class gr_threshold_ff : public gr_sync_block

{

  friend gr_threshold_ff_sptr gr_make_threshold_ff (float lo, float hi, float initial_state);

  float        d_lo,d_hi;                // the constant

  float d_last_state;

  gr_threshold_ff (float lo, float hi, float initial_state);

 public:

  float lo () const { return d_lo; }

  void set_lo (float lo) { d_lo = lo; }

  float hi () const { return d_hi; }

  void set_hi (float hi) { d_hi = hi; }

  float last_state () const { return d_last_state; }

  void set_last_state (float last_state) { d_last_state = last_state; }

  int work (int noutput_items,

            gr_vector_const_void_star &input_items,

            gr_vector_void_star &output_items);

};

#endif