fpll.h

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/* -*- c++ -*- */
/*
 * Copyright 2006 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_ATSC_FPLL_H
#define INCLUDED_ATSC_FPLL_H

#include <gnuradio/analog/agc.h>
#include <gnuradio/atsc/api.h>
#include <gnuradio/atsc/diag_output_impl.h>
#include <gnuradio/filter/single_pole_iir.h>
#include <gnuradio/nco.h>
#include <gnuradio/sync_block.h>
#include <stdio.h>

using namespace gr;

class atsc_fpll;
typedef boost::shared_ptr<atsc_fpll> atsc_fpll_sptr;

ATSC_API atsc_fpll_sptr atsc_make_fpll();

/*!
 * \brief ATSC FPLL (2nd Version)
 * \ingroup atsc
 *
 *  A/D --> GrFIRfilterFFF ----> GrAtscFPLL ---->
 *
 * We use GrFIRfilterFFF to bandpass filter the signal of interest.
 *
 * This class accepts a single real input and produces a single real output
 */

class ATSC_API atsc_fpll : public gr::sync_block
{
    friend ATSC_API atsc_fpll_sptr atsc_make_fpll();

    atsc_fpll();

public:
    int work(int noutput_items,
             gr_vector_const_void_star& input_items,
             gr_vector_void_star& output_items);

    void reset()
    { /* nop */
    }

    void initialize();

protected:
    double initial_freq;
    double initial_phase;
    bool debug_no_update;
    gr::nco<float, float> nco;
    analog::kernel::agc_ff agc; // automatic gain control
    filter::single_pole_iir<float, float, float> afci;
    filter::single_pole_iir<float, float, float> afcq;
};


#endif /* INCLUDED_ATSC_FPLL_H */