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/* -*- c++ -*- */
/*
* Copyright 2008 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_STRETCH_FF_H_
# define INCLUDED_GR_STRETCH_FF_H_
#include <gr_core_api.h>
#include <gr_sync_block.h>
/*!
* \brief adjust y-range of an input vector by mapping to range
* (max-of-input, stipulated-min). Primarily for spectral signature
* matching by normalizing spectrum dynamic ranges.
* \ingroup misc_blk
*/
class gr_stretch_ff;
typedef boost::shared_ptr<gr_stretch_ff> gr_stretch_ff_sptr;
GR_CORE_API gr_stretch_ff_sptr gr_make_stretch_ff(float lo, size_t vlen);
class GR_CORE_API gr_stretch_ff : public gr_sync_block
{
friend GR_CORE_API gr_stretch_ff_sptr gr_make_stretch_ff(float lo, size_t vlen);
float d_lo; // the constant
size_t d_vlen;
gr_stretch_ff(float lo, size_t vlen);
public:
float lo() const { return d_lo; }
void set_lo(float lo) { d_lo = lo; }
size_t vlen() const { return d_vlen; }
int work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif
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