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/* -*- c++ -*- */
/*
* Copyright 2010 KA1RBI
*
* This file is part of OP25.
*
* OP25 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.
*
* OP25 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 OP25; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef INCLUDED_OP25_FSK4_SLICER_FB_H
#define INCLUDED_OP25_FSK4_SLICER_FB_H
#include <gr_sync_block.h>
/**
* We use boost::shared_ptr's instead of raw pointers for all access
* to gr_blocks (and many other data structures). The shared_ptr gets
* us transparent reference counting, which greatly simplifies storage
* management issues. This is especially helpful in our hybrid
* C++ / Python system.
*
* See http://www.boost.org/libs/smart_ptr/smart_ptr.htm
*
* As a convention, the _sptr suffix indicates a boost::shared_ptr
*/
typedef boost::shared_ptr<class op25_fsk4_slicer_fb> op25_fsk4_slicer_fb_sptr;
/**
* Return a shared_ptr to a new instance of op25_fsk4_slicer_fb. To
* avoid accidental use of raw pointers, op25_fsk4_slicer_fb's
* constructor is private. op25_make_fsk4_slicer_fb is the public
* interface for creating new instances.
*/
op25_fsk4_slicer_fb_sptr op25_make_fsk4_slicer_fb (const std::vector<float> &slice_levels);
/**
* Produce a stream of dibits, given a stream of floats in [-3,-1,1,3].
* \ingroup block
*
* This uses the preferred technique: subclassing gr_sync_block.
*/
class op25_fsk4_slicer_fb : public gr_sync_block
{
public:
virtual ~op25_fsk4_slicer_fb ();
virtual int work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
private:
/**
* The friend declaration allows op25_make_fsk4_slicer_fb to access
* the private constructor.
*/
friend op25_fsk4_slicer_fb_sptr op25_make_fsk4_slicer_fb (const std::vector<float> &slice_levels);
op25_fsk4_slicer_fb (const std::vector<float> &slice_levels);
float d_slice_levels[4];
};
#endif /* INCLUDED_OP25_FSK4_SLICER_FB_H */
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