GNU Radio 3.5.3.2 C++ API
atsc_fpll.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2006 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
7  * GNU Radio is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 3, or (at your option)
10  * any later version.
11  *
12  * GNU Radio is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with GNU Radio; see the file COPYING. If not, write to
19  * the Free Software Foundation, Inc., 51 Franklin Street,
20  * Boston, MA 02110-1301, USA.
21  */
22 #ifndef INCLUDED_ATSC_FPLL_H
23 #define INCLUDED_ATSC_FPLL_H
24 
25 #include <atsc_api.h>
26 #include <gr_sync_block.h>
27 #include <gr_nco.h>
28 #include <gr_single_pole_iir.h>
29 #include <gri_agc_ff.h>
30 #include <stdio.h>
31 #include <atsci_diag_output.h>
32 
33 class atsc_fpll;
35 
37 
38 /*!
39  * \brief ATSC FPLL (2nd Version)
40  * \ingroup atsc
41  *
42  * A/D --> GrFIRfilterFFF ----> GrAtscFPLL ---->
43  *
44  * We use GrFIRfilterFFF to bandpass filter the signal of interest.
45  *
46  * This class accepts a single real input and produces a single real output
47  */
48 
50 {
52 
53  atsc_fpll();
54 
55 public:
56 
57  int work (int noutput_items,
58  gr_vector_const_void_star &input_items,
59  gr_vector_void_star &output_items);
60 
61  void reset() { /* nop */ }
62 
63  void initialize () ;
64 
65  protected:
66 
67  double initial_freq;
68  double initial_phase;
69  bool debug_no_update;
71  gri_agc_ff agc; // automatic gain control
74 
75 
76 };
77 
78 
79 #endif /* INCLUDED_ATSC_FPLL_H */