/* -*- c++ -*- */
/*
 * Copyright 2004,2011,2012,2014 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_DIGITAL_CLOCK_RECOVERY_MM_CC_IMPL_H
#define INCLUDED_DIGITAL_CLOCK_RECOVERY_MM_CC_IMPL_H

#include <gnuradio/digital/clock_recovery_mm_cc.h>
#include <gnuradio/filter/mmse_fir_interpolator_cc.h>

namespace gr {
namespace digital {

class clock_recovery_mm_cc_impl : public clock_recovery_mm_cc
{
public:
    clock_recovery_mm_cc_impl(float omega,
                              float gain_omega,
                              float mu,
                              float gain_mu,
                              float omega_relative_limi);
    ~clock_recovery_mm_cc_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 { return d_mu; }
    float omega() const { return d_omega; }
    float gain_mu() const { return d_gain_mu; }
    float gain_omega() const { return d_gain_omega; }

    void set_verbose(bool verbose) { d_verbose = verbose; }
    void set_gain_mu(float gain_mu) { d_gain_mu = gain_mu; }
    void set_gain_omega(float gain_omega) { d_gain_omega = gain_omega; }
    void set_mu(float mu) { d_mu = mu; }
    void set_omega(float omega);

private:
    float d_mu;                   // fractional sample position [0.0, 1.0]
    float d_omega;                // nominal frequency
    float d_gain_omega;           // gain for adjusting omega
    float d_omega_relative_limit; // used to compute min and max omega
    float d_omega_mid;            // average omega
    float d_omega_lim;            // actual omega clipping limit
    float d_gain_mu;              // gain for adjusting mu

    gr_complex d_last_sample;
    filter::mmse_fir_interpolator_cc* d_interp;

    bool d_verbose;

    gr_complex d_p_2T, d_p_1T, d_p_0T;
    gr_complex d_c_2T, d_c_1T, d_c_0T;

    gr_complex slicer_0deg(gr_complex sample);
    gr_complex slicer_45deg(gr_complex sample);
};

} /* namespace digital */
} /* namespace gr */

#endif /* INCLUDED_DIGITAL_CLOCK_RECOVERY_MM_CC_IMPL_H */
