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gr_threshold_ff.h

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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2004 Free Software Foundation, Inc.
00004  * 
00005  * This file is part of GNU Radio
00006  * 
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 2, or (at your option)
00010  * any later version.
00011  * 
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00020  * Boston, MA 02111-1307, USA.
00021  */
00022 
00023 #ifndef INCLUDED_GR_THRESHOLD_FF_H
00024 #define INCLUDED_GR_THRESHOLD_FF_H
00025 
00026 #include <gr_sync_block.h>
00027 
00028 class gr_threshold_ff;
00029 typedef boost::shared_ptr<gr_threshold_ff> gr_threshold_ff_sptr;
00030 
00031 gr_threshold_ff_sptr gr_make_threshold_ff (float lo, float hi, float initial_state=0);
00032 
00037 class gr_threshold_ff : public gr_sync_block
00038 {
00039   friend gr_threshold_ff_sptr gr_make_threshold_ff (float lo, float hi, float initial_state);
00040 
00041   float d_lo,d_hi;              // the constant
00042   float d_last_state;
00043   gr_threshold_ff (float lo, float hi, float initial_state);
00044 
00045  public:
00046   float lo () const { return d_lo; }
00047   void set_lo (float lo) { d_lo = lo; }
00048   float hi () const { return d_hi; }
00049   void set_hi (float hi) { d_hi = hi; }
00050   float last_state () const { return d_last_state; }
00051   void set_last_state (float last_state) { d_last_state = last_state; }
00052 
00053   int work (int noutput_items,
00054             gr_vector_const_void_star &input_items,
00055             gr_vector_void_star &output_items);
00056 };
00057 
00058 #endif

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