GNU Radio 3.6.5 C++ API

gr_moving_average_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 // WARNING: this file is machine generated. Edits will be overwritten
00024 
00025 #ifndef INCLUDED_GR_GR_MOVING_AVERAGE_FF_H
00026 #define INCLUDED_GR_GR_MOVING_AVERAGE_FF_H
00027 
00028 #include <gr_core_api.h>
00029 #include <gr_sync_block.h>
00030 
00031 class gr_moving_average_ff;
00032 
00033 typedef boost::shared_ptr<gr_moving_average_ff> gr_moving_average_ff_sptr;
00034 
00035 GR_CORE_API gr_moving_average_ff_sptr gr_make_moving_average_ff (int length, float scale, int max_iter = 4096);
00036 
00037 /*!
00038  * \brief output is the moving sum of the last N samples, scaled by the scale factor
00039  *
00040  * max_iter limits how long we go without flushing the accumulator
00041  * This is necessary to avoid numerical instability for float and complex.
00042  */
00043 class GR_CORE_API gr_moving_average_ff : public gr_sync_block
00044 {
00045 private:
00046   friend GR_CORE_API gr_moving_average_ff_sptr gr_make_moving_average_ff(int length, float scale, int max_iter);
00047 
00048   gr_moving_average_ff (int length, float scale, int max_iter = 4096);
00049 
00050   int d_length;
00051   float d_scale;
00052   int d_max_iter;
00053 
00054   int d_new_length;
00055   float d_new_scale;
00056   bool d_updated;
00057 
00058 public:
00059   ~gr_moving_average_ff ();
00060 
00061   int work (int noutput_items,
00062             gr_vector_const_void_star &input_items,
00063             gr_vector_void_star &output_items);
00064 
00065   int length() const { return d_new_length; }
00066   float scale() const { return d_new_scale; }
00067 
00068   void set_length_and_scale(int length, float scale);
00069 };
00070 
00071 #endif /* INCLUDED_GR_GR_MOVING_AVERAGE_FF_H */