kopia lustrzana https://github.com/jamescoxon/dl-fldigi
138 wiersze
2.9 KiB
C++
138 wiersze
2.9 KiB
C++
// ----------------------------------------------------------------------------
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// throb.h -- BASIS FOR ALL MODEMS
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//
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// Copyright (C) 2006-2007
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// Dave Freese, W1HKJ
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//
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// This file is part of fldigi.
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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 _THROB_H
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#define _THROB_H
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#include "modem.h"
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#include "globals.h"
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#include "fftfilt.h"
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#include "filters.h"
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#include "complex.h"
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#include "mbuffer.h"
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#define THROB_SAMPLE_RATE 8000
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#define SYMLEN 512
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#define BUFFLEN 4096
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#define SCOPE_DATA_LEN 1024
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#define DOWN_SAMPLE 32
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#define SYMLEN_1 8192
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#define SYMLEN_2 4096
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#define SYMLEN_4 2048
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#define MAX_RX_SYMLEN (SYMLEN_1 / DOWN_SAMPLE)
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#define FilterFFTLen 8192
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class throb : public modem {
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static double ThrobToneFreqsNar[];
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static double ThrobToneFreqsWid[];
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static double ThrobXToneFreqsNar[];
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static double ThrobXToneFreqsWid[];
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static unsigned char ThrobCharSet[];
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static unsigned char ThrobXCharSet[];
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static int ThrobTonePairs[][2];
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static int ThrobXTonePairs[][2];
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protected:
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int num_tones;
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int num_chars;
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int idlesym;
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int spacesym;
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char lastchar;
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double phaseacc;
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double phaseincr;
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fftfilt *fftfilter;
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C_FIR_filter *syncfilt;
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C_FIR_filter *hilbert;
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Cmovavg *snfilter;
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int symlen;
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double freqs[55];
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// receive
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double *scope_data;
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cmplx *rxtone[55];
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cmplx symbol[MAX_RX_SYMLEN];
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double syncbuf[MAX_RX_SYMLEN];
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mbuffer<double, MAX_RX_SYMLEN, 2> dispbuf;
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double rxcntr;
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double signal;
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double noise;
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double s2n;
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int rxsymlen;
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int symptr;
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int deccntr;
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int shift;
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int waitsync;
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cmplx mixer(cmplx in);
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void sync(cmplx in);
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void rx(cmplx in);
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void decodechar(int tone1, int tone2);
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int findtones(cmplx *word, int &tone1, int &tone2);
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cmplx *mk_rxtone(double freq, double *pulse, int len);
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void show_char(int);
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void flip_syms();
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void reset_syms();
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// transmit
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int txstate;
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int preamble;
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double *txpulse;
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double *outbuf;
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unsigned int buffptr;
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double *mk_semi_pulse(int len);
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double *mk_full_pulse(int len);
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void send(int);
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public:
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throb(trx_mode);
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~throb();
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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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void update_syncscope();
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};
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#endif
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