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/*
* Copyright 2006,2007 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_PAGER_SLICER_FB_H
#define INCLUDED_PAGER_SLICER_FB_H
#include <gr_sync_block.h>
class pager_slicer_fb;
typedef boost::shared_ptr<pager_slicer_fb> pager_slicer_fb_sptr;
pager_slicer_fb_sptr pager_make_slicer_fb(float alpha);
/*!
* \brief slicer description
* \ingroup block
*/
class pager_slicer_fb : public gr_sync_block
{
private:
friend pager_slicer_fb_sptr pager_make_slicer_fb(float alpha);
pager_slicer_fb(float alpha);
unsigned char slice(float sample);
float d_alpha; // DC removal time constant
float d_beta; // 1.0-d_alpha
float d_avg; // Average value for DC offset subtraction
public:
int work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
float dc_offset() const { return d_avg; }
};
#endif /* INCLUDED_PAGER_SLICER_FB_H */
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