Working decoder refactor using decode cycles based on buffer size instead of symbol half step nonsense
This commit is contained in:
Jordan Sherer
parent
fdac8556f5
commit
a24e4429ea
@ -31,6 +31,9 @@ public:
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Q_SIGNAL void framesWritten (qint64) const;
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Q_SLOT void setBlockSize (unsigned);
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void clear (); // discard buffer contents
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unsigned secondInPeriod () const;
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protected:
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qint64 readData (char * /* data */, qint64 /* maxSize */) override
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{
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@ -40,9 +43,6 @@ protected:
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qint64 writeData (char const * data, qint64 maxSize) override;
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private:
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void clear (); // discard buffer contents
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unsigned secondInPeriod () const;
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unsigned m_frameRate;
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unsigned m_period;
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unsigned m_downSampleFactor;
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@ -93,6 +93,8 @@ extern struct dec_data {
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int nfb; //High decode limit (Hz)
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int ntol; //+/- decoding range around fQSO (Hz)
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int kin; // number of frames written to d2
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int kpos; // starting position of decode
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int kout; // number of frames for decode
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int nzhsym; // half symbol stop index
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int nsubmode;
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bool nagain;
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@ -19,6 +19,8 @@
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integer(c_int) :: nfb
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integer(c_int) :: ntol
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integer(c_int) :: kin
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integer(c_int) :: kpos
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integer(c_int) :: kout
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integer(c_int) :: nzhsym
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integer(c_int) :: nsubmode
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logical(c_bool) :: nagain
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@ -284,7 +284,7 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
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m_logDlg (new LogQSO (program_title (), m_settings, &m_config, nullptr)),
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m_lastDialFreq {0},
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m_detector {new Detector {RX_SAMPLE_RATE, NTMAX, downSampleFactor}},
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m_FFTSize {6192 / 2}, // conservative value to avoid buffer overruns
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m_FFTSize {6912 / 2}, // conservative value to avoid buffer overruns
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m_soundInput {new SoundInput},
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m_modulator {new Modulator {TX_SAMPLE_RATE, NTMAX}},
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m_soundOutput {new SoundOutput},
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@ -2461,7 +2461,14 @@ void MainWindow::fixStop()
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int MainWindow::computeStop(int submode, int period){
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int stop = 0;
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#if 0
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#if 1
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switch(submode){
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case Varicode::JS8CallNormal: stop = 50; break; // tx dur + 1.76s (74.5%)
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case Varicode::JS8CallFast: stop = 30; break; //
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case Varicode::JS8CallTurbo: stop = 16; break; //
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case Varicode::JS8CallUltra: stop = 11; break; //
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}
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#elif 0
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stop=((int(period/0.288))/8)*8 - 1; // 0.288 because 6912/12000/2 = 0.288
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if(submode == Varicode::JS8CallUltra){
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stop++;
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@ -2472,10 +2479,10 @@ int MainWindow::computeStop(int submode, int period){
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int symbolSamples = 0;
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float threshold = 1.0;
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switch(submode){
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case Varicode::JS8CallNormal: symbolSamples = JS8A_SYMBOL_SAMPLES; threshold = 1.00; break;
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case Varicode::JS8CallFast: symbolSamples = JS8B_SYMBOL_SAMPLES; threshold = 1.08; break;
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case Varicode::JS8CallTurbo: symbolSamples = JS8C_SYMBOL_SAMPLES; threshold = 0.50; break;
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case Varicode::JS8CallUltra: symbolSamples = JS8D_SYMBOL_SAMPLES; threshold = 0.00; break;
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case Varicode::JS8CallNormal: symbolSamples = JS8A_SYMBOL_SAMPLES; /* threshold = 1.00 */ ; break;
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case Varicode::JS8CallFast: symbolSamples = JS8B_SYMBOL_SAMPLES; /* threshold = 1.08 */ ; break;
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case Varicode::JS8CallTurbo: symbolSamples = JS8C_SYMBOL_SAMPLES; /* threshold = 0.50 */ ; break;
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case Varicode::JS8CallUltra: symbolSamples = JS8D_SYMBOL_SAMPLES; /* threshold = 0.00 */ ; break;
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}
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stop = qFloor(float(symbolSamples*JS8_NUM_SYMBOLS + threshold*RX_SAMPLE_RATE)/(float)m_nsps*2.0);
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#endif
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@ -2483,6 +2490,10 @@ int MainWindow::computeStop(int submode, int period){
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return stop;
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}
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int MainWindow::computeStopSymbols(int submode, int period){
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return computeStop(submode, period) * m_nsps / 2.0;
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}
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//-------------------------------------------------------------- dataSink()
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void MainWindow::dataSink(qint64 frames)
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{
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@ -2561,8 +2572,26 @@ void MainWindow::dataSink(qint64 frames)
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// if the current half symbol index is the half symbol stop index, then proceed
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qint32 submode = m_nSubMode;
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qint32 period = m_TRperiod;
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qint32 halfSymbolStop = m_hsymStop;
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bool newDataReady = m_ihsym % m_hsymStop == 0;
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#if JS8_RING_BUFFER
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qint32 cycle = m_detector->secondInPeriod() / period;
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qint32 samplesPerCycle = period * RX_SAMPLE_RATE;
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qint32 cycleSampleStart = cycle * samplesPerCycle;
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qint32 symbolsNeeded = computeStopSymbols(submode, period);
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bool newDataReady = false;
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static int lastCycle = -1;
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if(cycle < lastCycle){
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lastCycle = -1;
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}
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if(cycle != lastCycle && k >= cycleSampleStart + symbolsNeeded){
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qDebug() << "cycle" << cycle << "start" << cycleSampleStart << "k" << k << "needed" << symbolsNeeded;
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dec_data.params.kout = symbolsNeeded;
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dec_data.params.kpos = cycleSampleStart;
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newDataReady = true;
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lastCycle = cycle;
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}
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#endif
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#if JS8_DECODER_E2S
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// decoding every 2 seconds
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@ -2647,7 +2676,7 @@ void MainWindow::dataSink(qint64 frames)
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dec_data.params.npts8=(m_ihsym*m_nsps)/16;
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dec_data.params.newdat=1;
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dec_data.params.nagain=0;
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dec_data.params.nzhsym=halfSymbolStop;
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dec_data.params.nzhsym=m_ihsym;
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m_dateTime = now.toString ("yyyy-MMM-dd hh:mm");
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#if JS8_DECODER_ONE
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@ -4064,26 +4093,32 @@ void MainWindow::decode(int submode, int period)
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// clear out d1
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memset(dec_data.d1, 0, sizeof(dec_data.d1));
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// copy the whole sample if disk data, otherwise, copy the needed frames
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// copy the whole sample if disk data, otherwise, copy only the needed frames
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if(m_diskData){
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qDebug() << "try decode from" << 0 << "to" << dec_data.params.kin;
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memcpy(dec_data.d1, dec_data.d2, sizeof(dec_data.d2));
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} else {
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// compute frames to copy for decoding
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int neededFrames = dec_data.params.nzhsym * m_nsps / 2.0;
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int start = qMax(0, dec_data.params.kin-neededFrames);
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int stop = qMin(start + neededFrames, dec_data.params.kin);
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int neededFrames = dec_data.params.kout;
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int start = dec_data.params.kpos;
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int stop = qMax(start + neededFrames, dec_data.params.kin); // copy more than needed if available
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int availableFrames = stop - start;
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int missingFrames = neededFrames - availableFrames;
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qDebug() << "try decode from" << start << "to" << stop << "available" << availableFrames << "missing" << missingFrames;
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if(missingFrames){
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// the maximum frame is the period sample size
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int maxFrames = m_detector->period() * RX_SAMPLE_RATE;
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qDebug() << "-> copy missing frames from" << maxFrames-missingFrames << "to" << maxFrames << "to beginning of d1";
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memcpy(dec_data.d1, &dec_data.d2[maxFrames-missingFrames], sizeof(dec_data.d2[0]) * missingFrames);
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}
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memcpy(dec_data.d1 + missingFrames, dec_data.d2 + start, sizeof(dec_data.d2[0]) * availableFrames);
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// TODO: missing frames happen if we run a decode period not relative to the period interval...
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// we'll need to figure out the best way to use the ring buffer in these situations.
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// if(missingFrames){
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// // the maximum frame is the period sample size
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// int maxFrames = m_detector->period() * RX_SAMPLE_RATE;
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// qDebug() << "-> copy missing frames from" << maxFrames-missingFrames << "to" << maxFrames << "to beginning of d1";
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// memcpy(dec_data.d1, &dec_data.d2[maxFrames-missingFrames], sizeof(dec_data.d2[0]) * missingFrames);
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// }
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//memcpy(dec_data.d1 + missingFrames, dec_data.d2 + start, sizeof(dec_data.d2[0]) * availableFrames);
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memcpy(dec_data.d1, dec_data.d2 + start, sizeof(dec_data.d2[0]) * availableFrames);
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}
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#else
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qDebug() << "try decode from" << 0 << "to" << dec_data.params.kin;
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@ -7071,9 +7106,13 @@ void MainWindow::on_actionJS8_triggered()
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}
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m_wideGraph->show();
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ui->decodedTextLabel2->setText(" UTC dB DT Freq Message");
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m_wideGraph->setPeriod(m_TRperiod,m_nsps);
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m_wideGraph->setPeriod(m_TRperiod, m_nsps);
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m_modulator->setTRPeriod(m_TRperiod); // TODO - not thread safe
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#if JS8_RING_BUFFER
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m_detector->setTRPeriod(30); // TODO - not thread safe
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#else
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m_detector->setTRPeriod(m_TRperiod); // TODO - not thread safe
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#endif
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ui->label_7->setText("Rx Frequency");
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if(m_config.bFox()) {
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ui->label_6->setText("Stations calling DXpedition " + m_config.my_callsign());
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@ -926,6 +926,7 @@ private:
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void statusChanged();
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void fixStop();
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int computeStop(int submode, int period);
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int computeStopSymbols(int submode, int period);
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bool shortList(QString callsign);
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void transmit (double snr = 99.);
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void rigFailure (QString const& reason);
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