mirror of https://github.com/f4exb/sdrangel.git
126 lines
3.3 KiB
C++
126 lines
3.3 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2016 F4EXB //
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// written by Edouard Griffiths //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef SDRBASE_DSP_CWKEYER_H_
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#define SDRBASE_DSP_CWKEYER_H_
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#include <QObject>
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#include <QMutex>
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#include "util/export.h"
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class SDRANGEL_API CWKeyer : public QObject {
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Q_OBJECT
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public:
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typedef enum
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{
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CWNone,
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CWText,
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CWDots,
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CWDashes
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} CWMode;
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typedef enum
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{
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KeySilent,
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KeyDot,
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KeyDash
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} CWKeyIambicState;
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typedef enum
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{
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TextStart,
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TextStartChar,
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TextStartElement,
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TextElement,
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TextCharSpace,
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TextWordSpace,
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TextEnd,
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TextStop
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} CWTextState;
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CWKeyer();
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~CWKeyer();
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void resetToDefaults();
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QByteArray serialize() const;
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bool deserialize(const QByteArray& data);
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void setSampleRate(int sampleRate);
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void setWPM(int wpm);
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void setText(const QString& text);
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void setMode(CWMode mode);
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void setLoop(bool loop) { m_loop = loop; }
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int getSample();
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bool eom();
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void resetText() { m_textState = TextStart; }
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void stopText() { m_textState = TextStop; }
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private:
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QMutex m_mutex;
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int m_sampleRate;
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int m_wpm;
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int m_dotLength; //!< dot length in samples
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QString m_text;
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int m_textPointer;
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int m_elementPointer;
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int m_samplePointer;
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bool m_elementSpace;
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bool m_characterSpace;
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bool m_key;
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bool m_dot;
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bool m_dash;
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bool m_elementOn;
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bool m_loop;
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char m_asciiChar;
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CWMode m_mode;
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CWKeyIambicState m_keyIambicState;
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CWTextState m_textState;
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static const char m_asciiToMorse[128][7];
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void nextStateIambic();
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void nextStateText();
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};
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/**
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* Ancillary class to smooth out CW transitions with a sine shape
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*/
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class CWSmoother
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{
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public:
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CWSmoother();
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~CWSmoother();
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void setNbFadeSamples(unsigned int nbFadeSamples);
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bool getFadeSample(bool on, float& sample);
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private:
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QMutex m_mutex;
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int m_fadeInCounter;
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int m_fadeOutCounter;
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unsigned int m_nbFadeSamples;
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float *m_fadeInSamples;
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float *m_fadeOutSamples;
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float smootherstep(float x);
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};
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#endif /* SDRBASE_DSP_CWKEYER_H_ */
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