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Avoid the ring buffer if we're operating on disk data

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This commit is contained in:
Jordan Sherer 2019-10-31 07:53:48 -04:00
parent 3a46548527
commit fdac8556f5
2 changed files with 24 additions and 14 deletions
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1
commons.h
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@ -7,6 +7,7 @@
#define RX_SAMPLE_RATE 12000
#define JS8_USE_REFSPEC 1 // compute the signal refspec
#define JS8_USE_IHSYM 1 // compute ihsym manually instead of from symspec
#define JS8_RING_BUFFER 1 // use a ring buffer instead of clearing the decode frames
#define JS8_DECODER_ONE 1 // decode only one mode at a time
#define JS8_DECODER_E2S 0 // decode every 2 seconds instead of at the half symbol stop

37
mainwindow.cpp
View File

@ -2520,7 +2520,7 @@ void MainWindow::dataSink(qint64 frames)
int nsmo=m_wideGraph->smoothYellow()-1;
/// START IHSYM
#if JS8_USE_IHSYM
// moving ihsym computation to here from symspec.f90
// 1) set the initial ihsym
if(m_ihsym == 0){
@ -2542,6 +2542,9 @@ void MainWindow::dataSink(qint64 frames)
qDebug() << "dataSink" << k << "ihsym" << m_ihsym << "ihs" << ihs;
/// END IHSYM
#else
symspec_(&dec_data,&k,&trmin,&nsps,&m_inGain,&nsmo,&m_px,s,&m_df3,&m_ihsym,&m_npts8,&m_pxmax);
#endif
if(m_ihsym <= 0) return;
@ -4061,21 +4064,27 @@ void MainWindow::decode(int submode, int period)
// clear out d1
memset(dec_data.d1, 0, sizeof(dec_data.d1));
// compute frames to copy for decoding
int neededFrames = dec_data.params.nzhsym * m_nsps / 2.0;
int start = qMax(0, dec_data.params.kin-neededFrames);
int stop = qMin(start + neededFrames, dec_data.params.kin);
int availableFrames = stop - start;
int missingFrames = neededFrames - availableFrames;
// copy the whole sample if disk data, otherwise, copy the needed frames
if(m_diskData){
qDebug() << "try decode from" << 0 << "to" << dec_data.params.kin;
memcpy(dec_data.d1, dec_data.d2, sizeof(dec_data.d2));
} else {
// compute frames to copy for decoding
int neededFrames = dec_data.params.nzhsym * m_nsps / 2.0;
int start = qMax(0, dec_data.params.kin-neededFrames);
int stop = qMin(start + neededFrames, dec_data.params.kin);
int availableFrames = stop - start;
int missingFrames = neededFrames - availableFrames;
qDebug() << "try decode from" << start << "to" << stop << "available" << availableFrames << "missing" << missingFrames;
if(missingFrames){
// the maximum frame is the period sample size
int maxFrames = m_detector->period() * RX_SAMPLE_RATE;
qDebug() << "-> copy missing frames from" << maxFrames-missingFrames << "to" << maxFrames << "to beginning of d1";
memcpy(dec_data.d1, &dec_data.d2[maxFrames-missingFrames], sizeof(dec_data.d2[0]) * missingFrames);
qDebug() << "try decode from" << start << "to" << stop << "available" << availableFrames << "missing" << missingFrames;
if(missingFrames){
// the maximum frame is the period sample size
int maxFrames = m_detector->period() * RX_SAMPLE_RATE;
qDebug() << "-> copy missing frames from" << maxFrames-missingFrames << "to" << maxFrames << "to beginning of d1";
memcpy(dec_data.d1, &dec_data.d2[maxFrames-missingFrames], sizeof(dec_data.d2[0]) * missingFrames);
}
memcpy(dec_data.d1 + missingFrames, dec_data.d2 + start, sizeof(dec_data.d2[0]) * availableFrames);
}
memcpy(dec_data.d1 + missingFrames, dec_data.d2 + start, sizeof(dec_data.d2[0]) * availableFrames);
#else
qDebug() << "try decode from" << 0 << "to" << dec_data.params.kin;
memset(dec_data.d1, 0, sizeof(dec_data.d1));