kopia lustrzana https://github.com/jamescoxon/dl-fldigi
Upstream version 3.0preW
Stelios Bounanos
rodzic
ba91adf7d1
commit
29d5fe68e7
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@ -9,7 +9,7 @@ dnl major and minor must be integers; patch may
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dnl contain other characters or be empty
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m4_define(FLDIGI_MAJOR, [3])
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m4_define(FLDIGI_MINOR, [0])
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m4_define(FLDIGI_PATCH, [preV])
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m4_define(FLDIGI_PATCH, [preW])
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AC_INIT([fldigi], FLDIGI_MAJOR.FLDIGI_MINOR[FLDIGI_PATCH], [w1hkj AT w1hkj DOT com])
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@ -130,8 +130,6 @@ protected:
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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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Cmovavg *met1filt;
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Cmovavg *met2filt;
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Cmovavg *vidfilter[SCOPESIZE];
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Cmovavg *syncfilter;
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@ -182,7 +180,7 @@ protected:
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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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@ -57,7 +57,7 @@ void mfsk::tx_init(SoundBase *sc)
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scard = sc;
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txstate = TX_STATE_PREAMBLE;
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bitstate = 0;
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// counter = 0;
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videoText();
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}
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@ -116,8 +116,6 @@ mfsk::~mfsk()
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if (pipe) delete [] pipe;
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if (hbfilt) delete hbfilt;
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if (binsfft) delete binsfft;
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if (met1filt) delete met1filt;
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if (met2filt) delete met2filt;
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for (int i = 0; i < SCOPESIZE; i++) {
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if (vidfilter[i]) delete vidfilter[i];
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}
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@ -209,11 +207,10 @@ mfsk::mfsk(trx_mode mfsk_mode) : modem()
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tonespacing = (double) samplerate / symlen;
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basefreq = 1.0 * samplerate * basetone / symlen;
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binsfft = new sfft (symlen, basetone, basetone + numtones );//+ 3); // ?
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binsfft = new sfft (symlen, basetone, basetone + numtones );
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hbfilt = new C_FIR_filter();
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hbfilt->init_hilbert(37, 1);
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met1filt = new Cmovavg(32);
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met2filt = new Cmovavg(32);
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syncfilter = new Cmovavg(8);
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for (int i = 0; i < SCOPESIZE; i++)
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@ -382,7 +379,8 @@ void mfsk::recvchar(int c)
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// 88 nulls at 4 samples per pixel
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// 176 nulls at 2 samples per pixel
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counter = 352;
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if (symbolbit == 4) counter += symlen;
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// if (symbolbit == 4) counter += symlen;
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if (symbolbit == symbits) counter += symlen;
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rxstate = RX_STATE_PICTURE_START;
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picturesize = RXspp * picW * picH * (color ? 3 : 1);
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pixelnbr = 0;
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@ -393,6 +391,7 @@ void mfsk::recvchar(int c)
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picheader[PICHEADER -1] = 0;
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}
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put_rx_char(c);
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}
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void mfsk::recvbit(int bit)
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@ -417,19 +416,19 @@ void mfsk::decodesymbol(unsigned char symbol)
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symcounter = symcounter ? 0 : 1;
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// only modes with 5 symbits need a vote
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if (symbits == 5) {
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// only modes with 3 or 5 symbits need a vote
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if (symbits == 5 || symbits == 3) {
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if (symcounter) {
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if ((c = dec1->decode(symbolpair, &met)) == -1)
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return;
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met1 = met1filt->run(met);
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met1 = decayavg(met1, met, 32);
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if (met1 < met2)
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return;
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metric = met1 / 2.0;
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} else {
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if ((c = dec2->decode(symbolpair, &met)) == -1)
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return;
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met2 = met2filt->run(met);
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met2 = decayavg(met2, met, 32);
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if (met2 < met1)
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return;
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metric = met2 / 2.0;
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@ -438,7 +437,8 @@ void mfsk::decodesymbol(unsigned char symbol)
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if (symcounter) return;
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if ((c = dec2->decode(symbolpair, &met)) == -1)
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return;
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metric = met2filt->run(met / 2.0);
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met2 = decayavg(met2, met, 32);
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metric = met2 / 2.0;
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}
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display_metric(metric);
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@ -452,7 +452,7 @@ void mfsk::decodesymbol(unsigned char symbol)
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void mfsk::softdecode(complex *bins)
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{
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double tone, sum, b[symbits];
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double binmag, sum, b[symbits];
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unsigned char symbols[symbits];
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int i, j, k;
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@ -470,17 +470,20 @@ void mfsk::softdecode(complex *bins)
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else
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k = i;
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tone = bins[k].mag();
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binmag = bins[k].mag();
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for (k = 0; k < symbits; k++)
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b[k] += (j & (1 << (symbits - k - 1))) ? tone : -tone;
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b[k] += (j & (1 << (symbits - k - 1))) ? binmag : -binmag;
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sum += tone;
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sum += binmag;
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}
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// shift to range 0...260 ??? symbols are unsigned char
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// shift to range 0...255
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for (i = 0; i < symbits; i++)
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symbols[i] = (unsigned char)clamp(128.0 + (b[i] / sum * 128.0), 0, 255);// 260);
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if (staticburst)
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symbols[i] = 0; // puncturing
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else
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symbols[i] = (unsigned char)clamp(128.0 + (b[i] / sum * 128.0), 0, 255);
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rxinlv->symbols(symbols);
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@ -531,13 +534,13 @@ int mfsk::harddecode(complex *in)
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if (x > 2.0 * avg) burstcount++;
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}
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staticburst = (burstcount > numtones / 2);
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staticburst = (burstcount == numtones);
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if (!staticburst)
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afcmetric = 0.95*afcmetric + 0.05 * (2 * max / avg);
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else
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afcmetric = 0.0;
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return symbol;
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}
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@ -591,6 +594,7 @@ void mfsk::synchronize()
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void mfsk::reset_afc() {
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freqerr = 0.0;
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syncfilter->reset();
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return;
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}
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@ -598,8 +602,8 @@ void mfsk::afc()
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{
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complex z;
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complex prevvector;
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double f, f1, f2;
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double ts = tonespacing / 8;
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double f, f1;
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double ts = tonespacing / 4;
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if (sigsearch) {
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reset_afc();
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@ -610,8 +614,12 @@ void mfsk::afc()
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return;
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if (metric < progStatus.sldrSquelchValue)
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return;
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if (afcmetric < 6.0)
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if (afcmetric < 3.0)
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return;
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if (currsymbol != prev1symbol)
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return;
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// if (prev1symbol != prev2symbol)
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// return;
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if (pipeptr == 0)
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prevvector = pipe[2*symlen - 1].vector[currsymbol];
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@ -622,16 +630,13 @@ void mfsk::afc()
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f = z.arg() * samplerate / TWOPI;
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f1 = tonespacing * (basetone + currsymbol);
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f1 -= f;
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f1 /= numtones;
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f2 = CLAMP ( f1, freqerr - ts, freqerr + ts);
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if ( fabs(f1 - f) < ts) {
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freqerr = decayavg(freqerr, (f1 - f), 32);
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set_freq(frequency - freqerr);
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set_AFCind( freqerr );
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}
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freqerr = decayavg ( freqerr, f2, 128 );
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set_freq(frequency - freqerr);
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set_AFCind( freqerr );
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}
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void mfsk::eval_s2n()
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@ -706,15 +711,21 @@ int mfsk::rx_process(const double *buf, int len)
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currsymbol = harddecode(bins);
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currvector = bins[currsymbol];
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// frequency tracking
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afc();
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eval_s2n();
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// decode symbol
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softdecode(bins);
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// frequency tracking
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// afc();
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// eval_s2n();
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// decode symbol
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// softdecode(bins);
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// symbol sync
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synchronize();
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// frequency tracking
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afc();
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eval_s2n();
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prev2symbol = prev1symbol;
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prev2vector = prev1vector;
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prev1symbol = currsymbol;
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@ -941,7 +952,6 @@ int mfsk::tx_process()
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btnpicTxClose->show();
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abortxmt = false;
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rxstate = RX_STATE_DATA;
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// counter = 0;
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memset(picheader, ' ', PICHEADER - 1);
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picheader[PICHEADER -1] = 0;
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FL_UNLOCK_E();
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