WSJT-X/Detector.cpp
Joe Taylor ae88ed065b Fix some illogical use of variable m_RxLog.
Add -DUNIX flag to FFLAGS in Makefile.linux.
Tweak the use of framesAfterDownsample in Detector.cpp.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3631 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2014-01-09 18:14:58 +00:00

132 lines
4.4 KiB
C++

#include "Detector.hpp"
#include <QDateTime>
#include <QtAlgorithms>
#include <QDebug>
#include "commons.h"
extern "C" {
void fil4_(qint16*, qint32*, qint16*, qint32*);
}
Detector::Detector (unsigned frameRate, unsigned periodLengthInSeconds,
unsigned framesPerSignal, unsigned downSampleFactor,
QObject * parent)
: AudioDevice (parent)
, m_frameRate (frameRate)
, m_period (periodLengthInSeconds)
, m_downSampleFactor (downSampleFactor)
, m_framesPerSignal (framesPerSignal)
, m_monitoring (false)
, m_starting (false)
, m_buffer ((downSampleFactor > 1) ?
new short [framesPerSignal * downSampleFactor] : 0)
, m_bufferPos (0)
{
clear ();
}
bool Detector::reset ()
{
clear ();
return QIODevice::reset ();
}
void Detector::clear ()
{
// set index to roughly where we are in time (1ms resolution)
// qint64 now (QDateTime::currentMSecsSinceEpoch ());
// unsigned msInPeriod ((now % 86400000LL) % (m_period * 1000));
// jt9com_.kin = qMin ((msInPeriod * m_frameRate) / 1000, static_cast<unsigned> (sizeof (jt9com_.d2) / sizeof (jt9com_.d2[0])));
jt9com_.kin = 0;
// fill buffer with zeros (G4WJS commented out because it might cause decoder hangs)
// qFill (jt9com_.d2, jt9com_.d2 + sizeof (jt9com_.d2) / sizeof (jt9com_.d2[0]), 0);
}
qint64 Detector::writeData (char const * data, qint64 maxSize)
{
if (m_monitoring) {
// no torn frames
Q_ASSERT (!(maxSize % static_cast<qint64> (bytesPerFrame ())));
// these are in terms of input frames (not down sampled)
size_t framesAcceptable ((sizeof (jt9com_.d2) /
sizeof (jt9com_.d2[0]) - jt9com_.kin) * m_downSampleFactor);
size_t framesAccepted (qMin (static_cast<size_t> (maxSize /
bytesPerFrame ()), framesAcceptable));
if (framesAccepted < static_cast<size_t> (maxSize / bytesPerFrame ())) {
qDebug () << "dropped " << maxSize / bytesPerFrame () - framesAccepted
<< " frames of data on the floor!";
}
for (unsigned remaining = framesAccepted; remaining; ) {
size_t numFramesProcessed (qMin (m_framesPerSignal *
m_downSampleFactor - m_bufferPos, remaining));
if(m_downSampleFactor > 1) {
store (&data[(framesAccepted - remaining) * bytesPerFrame ()],
numFramesProcessed, &m_buffer[m_bufferPos]);
m_bufferPos += numFramesProcessed;
if(m_bufferPos==m_framesPerSignal*m_downSampleFactor && m_monitoring) {
qint32 framesToProcess (m_framesPerSignal * m_downSampleFactor);
qint32 framesAfterDownSample;
if(framesToProcess==13824 and jt9com_.kin>=0 and jt9com_.kin<1440000) {
fil4_(&m_buffer[0], &framesToProcess, &jt9com_.d2[jt9com_.kin],
&framesAfterDownSample);
jt9com_.kin += framesAfterDownSample;
} else {
qDebug() << "framesToProcess = " << framesToProcess;
qDebug() << "jt9com_.kin = " << jt9com_.kin;
qDebug() << "secondInPeriod = " << secondInPeriod();
}
Q_EMIT framesWritten (jt9com_.kin);
m_bufferPos = 0;
}
} else {
store (&data[(framesAccepted - remaining) * bytesPerFrame ()],
numFramesProcessed, &jt9com_.d2[jt9com_.kin]);
m_bufferPos += numFramesProcessed;
jt9com_.kin += numFramesProcessed;
if (m_bufferPos == static_cast<unsigned> (m_framesPerSignal) &&
m_monitoring) {
Q_EMIT framesWritten (jt9com_.kin);
m_bufferPos = 0;
}
}
if (!secondInPeriod ()) {
if (!m_starting) {
// next samples will be in new period so wrap around to
// start of buffer
//
// we don't bother calling reset () since we expect to fill
// the whole buffer and don't need to waste cycles zeroing
jt9com_.kin = 0;
m_bufferPos = 0;
m_starting = true;
}
} else if(m_starting) {
m_starting = false;
}
remaining -= numFramesProcessed;
}
} else {
jt9com_.kin = 0;
m_bufferPos = 0;
}
return maxSize; // we drop any data past the end of the buffer on
// the floor until the next period starts
}
unsigned Detector::secondInPeriod () const
{
// we take the time of the data as the following assuming no latency
// delivering it to us (not true but close enough for us)
qint64 now (QDateTime::currentMSecsSinceEpoch ());
unsigned secondInToday ((now % 86400000LL) / 1000);
return secondInToday % m_period;
}