GNU Radio 3.4.0 C++ API
gr_fractional_interpolator_cc.h
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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2004,2007 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_FRACTIONAL_INTERPOLATOR_CC_H
00024 #define INCLUDED_GR_FRACTIONAL_INTERPOLATOR_CC_H
00025 
00026 #include <gr_block.h>
00027 
00028 class gri_mmse_fir_interpolator_cc;
00029 
00030 class gr_fractional_interpolator_cc;
00031 typedef boost::shared_ptr<gr_fractional_interpolator_cc> gr_fractional_interpolator_cc_sptr;
00032 
00033 // public constructor
00034 gr_fractional_interpolator_cc_sptr gr_make_fractional_interpolator_cc (float phase_shift, float interp_ratio);
00035 
00036 /*!
00037  * \brief Interpolating mmse filter with gr_complex input, gr_complex output
00038  * \ingroup filter_blk
00039  */
00040 class gr_fractional_interpolator_cc : public gr_block
00041 {
00042 public:
00043   ~gr_fractional_interpolator_cc ();
00044   void forecast(int noutput_items, gr_vector_int &ninput_items_required);
00045   int general_work (int noutput_items,
00046                     gr_vector_int &ninput_items,
00047                     gr_vector_const_void_star &input_items,
00048                     gr_vector_void_star &output_items);
00049 
00050   float mu() const { return d_mu;}
00051   float interp_ratio() const { return d_mu_inc;}
00052   void set_mu (float mu) { d_mu = mu; }
00053   void set_interp_ratio (float interp_ratio) { d_mu_inc = interp_ratio; }
00054 
00055 protected:
00056   gr_fractional_interpolator_cc (float phase_shift, float interp_ratio);
00057 
00058 private:
00059   float                         d_mu;
00060   float                         d_mu_inc;
00061   gri_mmse_fir_interpolator_cc  *d_interp;
00062 
00063   friend gr_fractional_interpolator_cc_sptr
00064   gr_make_fractional_interpolator_cc (float phase_shift, float interp_ratio);
00065 };
00066 
00067 #endif