mirror of https://github.com/saitohirga/WSJT-X.git
93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
#include "Detector.hpp"
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#include <QDateTime>
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#include <QtAlgorithms>
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#include <QDebug>
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#include "commons.h"
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Detector::Detector (unsigned frameRate, unsigned periodLengthInSeconds, unsigned framesPerSignal, QObject * parent)
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: AudioDevice (parent)
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, m_frameRate (frameRate)
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, m_period (periodLengthInSeconds)
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, m_framesPerSignal (framesPerSignal)
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, m_monitoring (false)
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, m_starting (false)
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{
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clear ();
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}
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bool Detector::reset ()
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{
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clear ();
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return QIODevice::reset ();
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}
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void Detector::clear ()
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{
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// set index to roughly where we are in time (1ms resolution)
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// qint64 now (QDateTime::currentMSecsSinceEpoch ());
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// unsigned msInPeriod ((now % 86400000LL) % (m_period * 1000));
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// jt9com_.kin = qMin ((msInPeriod * m_frameRate) / 1000, static_cast<unsigned> (sizeof (jt9com_.d2) / sizeof (jt9com_.d2[0])));
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jt9com_.kin = 0;
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// fill buffer with zeros
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qFill (jt9com_.d2, jt9com_.d2 + sizeof (jt9com_.d2) / sizeof (jt9com_.d2[0]), 0);
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}
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qint64 Detector::writeData (char const * data, qint64 maxSize)
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{
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Q_ASSERT (!(maxSize % static_cast<qint64> (bytesPerFrame ()))); // no torn frames
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qint64 framesAcceptable (sizeof (jt9com_.d2) / sizeof (jt9com_.d2[0]) - jt9com_.kin);
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qint64 framesAccepted (qMin (static_cast<qint64> (maxSize / bytesPerFrame ()), framesAcceptable));
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if (framesAccepted < static_cast<qint64> (maxSize / bytesPerFrame ()))
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{
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qDebug () << "dropped " << maxSize / sizeof (jt9com_.d2[0]) - framesAccepted << " frames of data on the floor!";
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}
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store (data, framesAccepted, &jt9com_.d2[jt9com_.kin]);
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unsigned lastSignalIndex (jt9com_.kin / m_framesPerSignal);
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jt9com_.kin += framesAccepted;
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unsigned currentSignalIndex (jt9com_.kin / m_framesPerSignal);
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if (currentSignalIndex != lastSignalIndex && m_monitoring)
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{
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Q_EMIT framesWritten (currentSignalIndex * m_framesPerSignal);
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}
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if (!secondInPeriod ())
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{
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if (!m_starting)
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{
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// next samples will be in new period so wrap around to
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// start of buffer
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//
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// we don't bother calling reset () since we expect to fill
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// the whole buffer and don't need to waste cycles zeroing
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jt9com_.kin = 0;
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m_starting = true;
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}
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}
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else if (m_starting)
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{
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m_starting = false;
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}
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return maxSize; // we drop any data past the end of
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// the buffer on the floor until the
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// next period starts
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}
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unsigned Detector::secondInPeriod () const
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{
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// we take the time of the data as the following assuming no latency
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// delivering it to us (not true but close enough for us)
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qint64 now (QDateTime::currentMSecsSinceEpoch ());
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unsigned secondInToday ((now % 86400000LL) / 1000);
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return secondInToday % m_period;
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}
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