3 * Copyright 2004 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
23 #ifndef INCLUDED_GR_THRESHOLD_FF_H
24 #define INCLUDED_GR_THRESHOLD_FF_H
26 #include <gr_sync_block.h>
28 class gr_threshold_ff;
29 typedef boost::shared_ptr<gr_threshold_ff> gr_threshold_ff_sptr;
31 gr_threshold_ff_sptr gr_make_threshold_ff (float lo, float hi, float initial_state=0);
37 class gr_threshold_ff : public gr_sync_block
39 friend gr_threshold_ff_sptr gr_make_threshold_ff (float lo, float hi, float initial_state);
41 float d_lo,d_hi; // the constant
43 gr_threshold_ff (float lo, float hi, float initial_state);
46 float lo () const { return d_lo; }
47 void set_lo (float lo) { d_lo = lo; }
48 float hi () const { return d_hi; }
49 void set_hi (float hi) { d_hi = hi; }
50 float last_state () const { return d_last_state; }
51 void set_last_state (float last_state) { d_last_state = last_state; }
53 int work (int noutput_items,
54 gr_vector_const_void_star &input_items,
55 gr_vector_void_star &output_items);