kopia lustrzana https://github.com/jamescoxon/dl-fldigi
118 wiersze
2.6 KiB
C++
118 wiersze
2.6 KiB
C++
// ----------------------------------------------------------------------------
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// feld.h -- FELDHELL modem
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//
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// Copyright (C) 2006-2010
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// Dave Freese, W1HKJ
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//
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// This file is part of fldigi. Adapted from code contained in gmfsk source code
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// distribution.
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// gmfsk Copyright (C) 2001, 2002, 2003
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// Tomi Manninen (oh2bns@sral.fi)
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// Copyright (C) 2004
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// Lawrence Glaister (ve7it@shaw.ca)
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//
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// Fldigi is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Fldigi is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with fldigi. If not, see <http://www.gnu.org/licenses/>.
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// ----------------------------------------------------------------------------
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#ifndef _FELD_H
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#define _FELD_H
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#include "modem.h"
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#include "filters.h"
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#include "fftfilt.h"
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#include "mbuffer.h"
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#define FeldSampleRate 8000
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#define FeldMaxSymLen 1024
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#define MAXLEN 512
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#define FELD_RX_COLUMN_LEN 20
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class feld : public modem {
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enum FELD_STATE {PREAMBLE, POSTAMBLE, DATA};
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public:
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static int RxColumnLen;
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static int TxColumnLen;
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protected:
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//rx
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double rxphacc;
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double rxdelta;
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double rxcounter;
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double agc;
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double peakval;
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double peakhold;
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double minhold;
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double rxpixrate;
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double txpixrate;
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double downsampleinc;
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double upsampleinc;
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double phi2freq;
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C_FIR_filter *hilbert;
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fftfilt *bpfilt;
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Cmovavg *bbfilt;
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Cmovavg *minmaxfilt;
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Cmovavg *average;
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//tx
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FELD_STATE tx_state;
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double txphacc;
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double txcounter;
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double hell_bandwidth;
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double filter_bandwidth;
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int depth;
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int dxmode;
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int halfwidth;
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bool blackboard;
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bool hardkeying;
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double feldcolumnrate;
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int preamble;
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int postamble;
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int prevsymb;
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cmplx prev;
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double OnShape[MAXLEN];
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double OffShape[MAXLEN];
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mbuffer<int, 2*FELD_RX_COLUMN_LEN> col_data;
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int col_pointer;
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int fntnbr;
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cmplx mixer(cmplx);
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double nco(double);
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void rx(cmplx);
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void FSKHELL_rx(cmplx);
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void send_symbol(int currsymbol, int nextsymbol);
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void send_null_column();
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void tx_char(char);
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void initKeyWaveform();
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public:
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feld(trx_mode);
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~feld();
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void init();
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void rx_init();
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void tx_init(SoundBase *sc);
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void restart();
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int rx_process(const double *buf, int len);
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int tx_process();
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int get_font_data(unsigned char c, int col);
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};
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#endif
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