Merged master 8748

2018-08-05 11:33:30 -04:00
parent 8f8772f1bd
commit 62899069bf
1222 changed files with 70382 additions and 406763 deletions
@@ -0,0 +1,94 @@
+#ifndef MODULATOR_HPP__
+#define MODULATOR_HPP__
+
+#include <QAudio>
+#include <QPointer>
+
+#include "AudioDevice.hpp"
+
+class SoundOutput;
+
+//
+// Input device that generates PCM audio frames that encode a message
+// and an optional CW ID.
+//
+// Output can be muted while underway, preserving waveform timing when
+// transmission is resumed.
+//
+class Modulator
+  : public AudioDevice
+{
+  Q_OBJECT;
+
+public:
+  enum ModulatorState {Synchronizing, Active, Idle};
+
+  Modulator (unsigned frameRate, unsigned periodLengthInSeconds, QObject * parent = nullptr);
+
+  void close () override;
+
+  bool isTuning () const {return m_tuning;}
+  double frequency () const {return m_frequency;}
+  bool isActive () const {return m_state != Idle;}
+  void setSpread(double s) {m_fSpread=s;}
+  void setTRPeriod(unsigned p) {m_period=p;}
+  void set_nsym(int n) {m_symbolsLength=n;}
+
+  Q_SLOT void start (unsigned symbolsLength, double framesPerSymbol, double frequency,
+                     double toneSpacing, SoundOutput *, Channel = Mono,
+                     bool synchronize = true, bool fastMode = false,
+                     double dBSNR = 99., int TRperiod=60);
+  Q_SLOT void stop (bool quick = false);
+  Q_SLOT void tune (bool newState = true);
+  Q_SLOT void setFrequency (double newFrequency) {m_frequency = newFrequency;}
+  Q_SIGNAL void stateChanged (ModulatorState) const;
+
+protected:
+  qint64 readData (char * data, qint64 maxSize) override;
+  qint64 writeData (char const * /* data */, qint64 /* maxSize */) override
+  {
+    return -1;			// we don't consume data
+  }
+
+private:
+  qint16 postProcessSample (qint16 sample) const;
+
+  QPointer<SoundOutput> m_stream;
+  bool m_quickClose;
+
+  unsigned m_symbolsLength;
+
+  static double constexpr m_twoPi = 2.0 * 3.141592653589793238462;
+  unsigned m_nspd = 2048 + 512; // CW ID WPM factor = 22.5 WPM
+
+  double m_phi;
+  double m_dphi;
+  double m_amp;
+  double m_nsps;
+  double volatile m_frequency;
+  double m_frequency0;
+  double m_snr;
+  double m_fac;
+  double m_toneSpacing;
+  double m_fSpread;
+
+  qint64 m_silentFrames;
+  qint32 m_TRperiod;
+  qint16 m_ramp;
+
+  unsigned m_frameRate;
+  unsigned m_period;
+  ModulatorState volatile m_state;
+
+  bool volatile m_tuning;
+  bool m_addNoise;
+  bool m_bFastMode;
+
+  bool m_cwLevel;
+  unsigned m_ic;
+  unsigned m_isym0;
+  int m_j0;
+  double m_toneFrequency0;
+};
+
+#endif