kopia lustrzana https://github.com/jamescoxon/dl-fldigi
88 wiersze
2.1 KiB
C++
88 wiersze
2.1 KiB
C++
// ----------------------------------------------------------------------------
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// fftscan.h -- frequency fftscan modem
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//
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// Copyright (C) 2006
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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 _fftscan_H
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#define _fftscan_H
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#include <stdio.h>
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#include <string>
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#include <ctime>
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#include <complex>
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#include "filters.h"
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#include "fftfilt.h"
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#include "modem.h"
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#include "mbuffer.h"
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#include "gfft.h"
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class fftscan : public modem {
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public:
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#define fftscan_BW 4
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#define fftscan_SampleRate 8000
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#define fftscanFFT_LEN 8192 // approximately 1 sec of bpf'd audio stream
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#define NYQUIST 4000 // 1/2 fftscanFFT_LEN
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private:
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std::string fftscanFilename;
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bool write_to_csv;
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bool _refresh;
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double *fftbuff;
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std::complex<double> *dftbuff;
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double *buffer;
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g_fft<double> *scanfft;
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// int restart_count;
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//double sig_level;
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double wf_freq;
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long ticks;
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double scans;
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void writeFile();
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std::complex<double> dft (std::complex<double> *buff, double fm, double Ts, double offset);
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inline double blackman(double x) {
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return (0.42 - 0.50 * cos(2 * M_PI * x) + 0.08 * cos(4 * M_PI * x));
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}
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public:
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fftscan();
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~fftscan();
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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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void start_csv();
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void stop_csv();
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int is_csv() { return write_to_csv;}
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void update_syncscope();
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int rx_process(const double *buf, int len);
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void refresh_scope() { _refresh = true; }
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int tx_process();
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};
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#endif
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