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/* -*- c++ -*- */
/*
* Copyright 2002 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 _GRATSCFPLL_H_
#define _GRATSCFPLL_H_
#include <gr_nco.h>
#include <gr_iir.h>
#include <gr_single_pole_iir.h>
#include <gr_agc.h>
#include <VrSigProc.h>
#include <stdio.h>
#include <atsci_diag_output.h>
/*!
* \brief ATSC FPLL (2nd Version)
*
* Used as follows:
* float float
* 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 GrAtscFPLL : public VrSigProc {
protected:
typedef float iType;
typedef float oType;
public:
GrAtscFPLL (double a_initial_freq);
virtual ~GrAtscFPLL () {}
virtual const char *name () { return "GrAtscFPLL"; }
virtual void initialize ();
virtual int work (VrSampleRange output, void *o[],
VrSampleRange inputs[], void *i[]);
// diagnostic routines
void set_initial_phase (double phase) { initial_phase = phase; } // radians
void set_no_update (bool a_no_update) { debug_no_update = a_no_update; }
protected:
double initial_freq;
double initial_phase;
bool debug_no_update;
gr_nco<float,float> nco;
gr_agc agc; // automatic gain control
gr_single_pole_iir<float,float,float> afci;
gr_single_pole_iir<float,float,float> afcq;
#ifdef _FPLL_DIAG_OUTPUT_
FILE *fp;
#endif
};
#endif // _GRATSCFPLL_H_
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