WSJT-X/Detector.hpp
Joe Taylor 324169661e Forgot to include four files.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3526 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2013-08-05 17:41:12 +00:00

68 lines
1.5 KiB
C++

#ifndef DETECTOR_HPP__
#define DETECTOR_HPP__
#include <inttypes.h>
#include <QIODevice>
//
// output device that distributes data in predefined chunks via a signal
//
// the underlying device for this abstraction is just the buffer that
// stores samples throughout a receiving period
//
class Detector : public QIODevice
{
Q_OBJECT;
Q_PROPERTY (bool monitoring READ isMonitoring WRITE setMonitoring);
private:
Q_DISABLE_COPY (Detector);
public:
//
// if the data buffer were not global storage and fixed size then we
// might want maximum size passed as constructor arguments
//
Detector (unsigned frameRate, unsigned periodLengthInSeconds, unsigned bytesPerSignal, QObject * parent = 0);
bool open ()
{
// we only support data consumption and want it as fast as possible
return QIODevice::open (QIODevice::WriteOnly | QIODevice::Unbuffered);
}
bool isSequential () const
{
return true;
}
bool isMonitoring () const {return m_monitoring;}
void setMonitoring (bool newState) {m_monitoring = newState;}
bool reset ();
protected:
qint64 readData (char * /* data */, qint64 /* maxSize */)
{
return -1; // we don't produce data
}
qint64 writeData (char const * data, qint64 maxSize);
private:
typedef int16_t frame_t;
void clear (); // discard buffer contents
unsigned secondInPeriod () const;
unsigned m_frameRate;
unsigned m_period;
unsigned m_bytesPerSignal;
bool m_monitoring;
bool m_starting;
};
#endif