fractional_interpolator_ff_impl.h

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/* -*- c++ -*- */
/*
 * Copyright 2004,2007,2012 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_FRACTIONAL_INTERPOLATOR_FF_IMPL_H
#define INCLUDED_FRACTIONAL_INTERPOLATOR_FF_IMPL_H

#include <filter/fractional_interpolator_ff.h>
#include <filter/mmse_fir_interpolator_ff.h>

namespace gr {
  namespace filter {
    
    class FILTER_API fractional_interpolator_ff_impl
      : public fractional_interpolator_ff
    {
    private:
      float d_mu;
      float d_mu_inc;
      mmse_fir_interpolator_ff *d_interp;

    public:
      fractional_interpolator_ff_impl(float phase_shift,
                                      float interp_ratio);
      ~fractional_interpolator_ff_impl();

      void forecast(int noutput_items,
                    gr_vector_int &ninput_items_required);
      int general_work(int noutput_items,
                       gr_vector_int &ninput_items,
                       gr_vector_const_void_star &input_items,
                       gr_vector_void_star &output_items);

      float mu() const;
      float interp_ratio() const;
      void set_mu(float mu);
      void set_interp_ratio(float interp_ratio);
    };

  } /* namespace filter */
} /* namespace gr */

#endif /* INCLUDED_FRACTIONAL_INTERPOLATOR_FF_IMPL_H */