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https://github.com/saitohirga/WSJT-X.git
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f076c37c19
default). Reorganized Modulator interface so that it can control the stream it writes to. Make sure only QAudioOutput::stop is called at the end of sending rather than QAudioOutput::reset which discards pending samples. Added a quick close option to the Modulator::stop slot to discard pending buffers if required. Fix issue in CW synthesizer that was causing CW to be inverted occasionally. Made global arrays of symbols volatile because compiler waa optimizing away reads in sound thread. These global variables must go eventually as they are a multi-threading hazard. Simplified TX sequencing to remove some duplicate signals. Increased range of TX attenuator from 10dB to 30dB. This is mainly for non-Windows platforms where the attenuator isn't linearized correctly. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3985 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
88 lines
2.1 KiB
C++
88 lines
2.1 KiB
C++
#ifndef MODULATOR_HPP__
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#define MODULATOR_HPP__
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#include <QAudio>
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#include "AudioDevice.hpp"
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class SoundOutput;
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//
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// Input device that generates PCM audio frames that encode a message
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// and an optional CW ID.
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//
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// Output can be muted while underway, preserving waveform timing when
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// transmission is resumed.
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//
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class Modulator
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: public AudioDevice
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{
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Q_OBJECT;
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public:
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enum ModulatorState {Synchronizing, Active, Idle};
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Modulator (unsigned frameRate, unsigned periodLengthInSeconds, QObject * parent = nullptr);
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void close () override;
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bool isTuning () const {return m_tuning;}
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bool isMuted () const {return m_muted;}
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unsigned frequency () const {return m_frequency;}
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bool isActive () const {return m_state != Idle;}
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void setWide9(double d1, double d2) {m_toneSpacing=d1; m_fSpread=d2;}
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Q_SLOT void start (unsigned symbolsLength, double framesPerSymbol, unsigned frequency, SoundOutput *, Channel = Mono, bool synchronize = true, double dBSNR = 99.);
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Q_SLOT void stop (bool quick = false);
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Q_SLOT void tune (bool newState = true);
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Q_SLOT void mute (bool newState = true) {m_muted = newState;}
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Q_SLOT void setFrequency (unsigned newFrequency) {m_frequency = newFrequency;}
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Q_SIGNAL void stateChanged (ModulatorState) const;
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protected:
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qint64 readData (char * data, qint64 maxSize);
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qint64 writeData (char const * /* data */, qint64 /* maxSize */)
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{
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return -1; // we don't consume data
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}
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private:
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qint16 postProcessSample (qint16 sample) const;
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SoundOutput * m_stream;
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bool m_quickClose;
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unsigned m_symbolsLength;
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static double const m_twoPi;
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static unsigned const m_nspd; // CW ID WPM factor
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double m_phi;
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double m_dphi;
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double m_amp;
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double m_nsps;
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double volatile m_frequency;
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double m_snr;
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double m_fac;
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double m_toneSpacing;
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double m_fSpread;
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qint64 m_silentFrames;
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qint64 m_framesSent;
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unsigned m_frameRate;
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unsigned m_period;
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ModulatorState volatile m_state;
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bool volatile m_tuning;
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bool volatile m_muted;
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bool m_addNoise;
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bool m_cwLevel;
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unsigned m_ic;
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unsigned m_isym0;
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qint16 m_ramp;
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};
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#endif
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