kopia lustrzana https://github.com/jamescoxon/dl-fldigi
282 wiersze
6.1 KiB
C++
282 wiersze
6.1 KiB
C++
// ----------------------------------------------------------------------------
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// mfsk.h -- mfsk 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. 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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//
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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 _MFSK_H
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#define _MFSK_H
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#include <FL/Fl_Widget.H>
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#include <FL/Fl_Double_Window.H>
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#include <FL/Fl_Button.H>
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#include <FL/Fl_Shared_Image.H>
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#include "globals.h"
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#include "modem.h"
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#include "filters.h"
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#include "interleave.h"
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#include "viterbi.h"
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#include "complex.h"
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#include "mfskvaricode.h"
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#include "mbuffer.h"
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#include "picture.h"
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#define MFSKSampleRate 8000
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// 1 ms per pixel
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#define SAMPLES_PER_PIXEL 8
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#define MAX_SYMBOLS 32
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#define PICHEADER 64
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// NASA coefficients for viterbi encode/decode algorithms
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#define K 7
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#define POLY1 0x6d
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#define POLY2 0x4f
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class mfsk;
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extern int print_time_left(float secs, char *str, size_t len,
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const char *prefix = "", const char *suffix = "");
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extern void updateTxPic(unsigned char data);
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extern void updateRxPic(unsigned char data, int pos);
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extern void TxViewerResize(int W, int H);
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extern void showTxViewer(int W, int H);
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extern void createTxViewer();
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extern void createRxViewer();
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extern void showRxViewer(int W, int H);
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extern void deleteRxViewer();
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extern void deleteTxViewer();
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extern void cb_picRxClose( Fl_Widget *w, void *);
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extern void cb_picRxAbort( Fl_Widget *w, void *);
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extern void pic_TxSendColor();
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extern void pic_TxSendGrey();
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extern void cb_picTxSendColor( Fl_Widget *w, void *);
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extern void cb_picTxSendGrey( Fl_Widget *w, void *);
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extern void cb_picTxSendAbort( Fl_Widget *w, void *);
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extern void load_file(const char *n);
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extern Fl_Double_Window *picRxWin;
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extern picture *picRx;
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extern Fl_Button *btnpicRxSave;
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extern Fl_Button *btnpicRxAbort;
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extern Fl_Button *btnpicRxClose;
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extern Fl_Double_Window *picTxWin;
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extern picture *picTx;
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extern Fl_Button *btnpicTxSPP;
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extern Fl_Button *btnpicTxSendColor;
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extern Fl_Button *btnpicTxSendGrey;
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extern Fl_Button *btnpicTxSendAbort;
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extern Fl_Button *btnpicTxLoad;
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extern Fl_Button *btnpicTxClose;
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extern Fl_Shared_Image *TxImg;
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extern unsigned char *xmtimg;
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extern unsigned char *xmtpicbuff;
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struct rxpipe {
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cmplx vector[MAX_SYMBOLS]; //numtones <= 32
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};
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struct history {
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cmplx val;
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int symnbr;
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};
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class mfsk : public modem {
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#define SCOPESIZE 64
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friend void updateTxPic(unsigned char data);
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friend void cb_picRxClose( Fl_Widget *w, void *);
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friend void cb_picRxAbort( Fl_Widget *w, void *);
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friend void pic_TxSendColor();
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friend void pic_TxSendGrey();
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friend void cb_picTxSendColor( Fl_Widget *w, void *);
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friend void cb_picTxSendGrey( Fl_Widget *w, void *);
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friend void cb_picTxSendAbort( Fl_Widget *w, void *);
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friend void cb_picTxSPP( Fl_Widget *w, void *);
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friend int load_image(const char *n);
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public:
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enum {
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TX_STATE_PREAMBLE,
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TX_STATE_START,
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TX_STATE_DATA,
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TX_STATE_END,
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TX_STATE_FLUSH,
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TX_STATE_FINISH,
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TX_STATE_TUNE,
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TX_STATE_PICTURE_START,
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TX_STATE_PICTURE
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};
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enum {
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RX_STATE_DATA,
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RX_STATE_PICTURE_START,
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// RX_STATE_PICTURE_START_1,
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// RX_STATE_PICTURE_START_2,
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RX_STATE_PICTURE
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};
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protected:
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// general
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double phaseacc;
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int symlen;
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int symbits;
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int numtones;
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int basetone;
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double tonespacing;
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double basefreq;
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int counter;
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int depth;
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// receive
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int rxstate;
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C_FIR_filter *hbfilt;
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sfft *binsfft;
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C_FIR_filter *bpfilt;
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C_FIR_filter *xmtfilt;
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Cmovavg *vidfilter[SCOPESIZE];
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Cmovavg *syncfilter;
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viterbi *dec1;
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viterbi *dec2;
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interleave *rxinlv;
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rxpipe *pipe;
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unsigned int pipeptr;
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unsigned int datashreg;
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//VK2ETA high speed modes
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int preamble;
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cmplx currvector;
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cmplx prev1vector;
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cmplx prev2vector;
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int currsymbol;
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int prev1symbol;
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int prev2symbol;
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double maxval;
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double prevmaxval;
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double met1;
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double met2;
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mbuffer<double, 0, 2> scopedata;
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double s2n;
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double sig;
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double noise;
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double afcmetric;
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bool staticburst;
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double currfreq;
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int synccounter;
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int AFC_COUNT;
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unsigned char symbolpair[2];
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int symcounter;
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int RXspp; // samples per pixel
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int TXspp;
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int symbolbit;
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// transmit
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int txstate;
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encoder *enc;
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interleave *txinlv;
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unsigned int bitshreg;
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int bitstate;
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// Picutre data and methods
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int picturesize;
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char picheader[PICHEADER];
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cmplx prevz;
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double picf;
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unsigned char prepost[128];
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int row;
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int col;
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int rgb;
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int pixelnbr;
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int picW;
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int picH;
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bool color;
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unsigned char picprologue[176];
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int xmtbytes;
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bool startpic;
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bool abortxmt;
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void recvpic(cmplx z);
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void recvchar(int c);
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void recvbit(int bit);
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// internal processes
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void decodesymbol(unsigned char symbol);
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void softdecode(cmplx *bins);
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cmplx mixer(cmplx in, double f);
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int harddecode(cmplx *in);
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void update_syncscope();
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void synchronize();
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void afc();
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void reset_afc();
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void eval_s2n();
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void transmit(double *, int);
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void sendsymbol(int sym);
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void sendbit(int bit);
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void sendchar(unsigned char c);
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void sendidle();
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void flush_xmt_filter(int);
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void send_prologue();
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void send_epilogue();
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void flushtx(int nbits);
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void clearbits();
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void sendpic(unsigned char *data, int len);
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bool check_picture_header(char c);
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void s2nreport(void);
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public:
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mfsk (trx_mode md);
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~mfsk ();
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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 send_color_image(std::string s);
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void send_Grey_image(std::string s);
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void shutdown();
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};
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#endif
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