GNU Radio 3.6.5 C++ API

gr_stretch_ff.h

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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2008 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 3, 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., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 
00023 #ifndef         INCLUDED_GR_STRETCH_FF_H_
00024 # define        INCLUDED_GR_STRETCH_FF_H_
00025 
00026 #include <gr_core_api.h>
00027 #include <gr_sync_block.h>
00028 
00029 /*!
00030  * \brief adjust y-range of an input vector by mapping to range
00031  * (max-of-input, stipulated-min). Primarily for spectral signature
00032  * matching by normalizing spectrum dynamic ranges.
00033  */
00034 
00035 
00036 class gr_stretch_ff;
00037 typedef boost::shared_ptr<gr_stretch_ff> gr_stretch_ff_sptr;
00038 
00039 GR_CORE_API gr_stretch_ff_sptr gr_make_stretch_ff(float lo, size_t vlen);
00040 
00041 class GR_CORE_API gr_stretch_ff : public gr_sync_block
00042 {
00043   friend GR_CORE_API gr_stretch_ff_sptr gr_make_stretch_ff(float lo, size_t vlen);
00044 
00045   float d_lo;           // the constant
00046   size_t d_vlen;
00047   gr_stretch_ff(float lo, size_t vlen);
00048 
00049  public:
00050   float lo() const { return d_lo; }
00051   void set_lo(float lo) { d_lo = lo; }
00052   size_t vlen() const { return d_vlen; }
00053 
00054   int work(int noutput_items,
00055            gr_vector_const_void_star &input_items,
00056            gr_vector_void_star &output_items);
00057 };
00058 
00059 #endif