sdrangel/plugins/channeltx/modm17/m17modsource.h

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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2022 Edouard Griffiths, F4EXB //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef INCLUDE_M17MODSOURCE_H
#define INCLUDE_M17MODSOURCE_H
#include <QObject>
#include <QRecursiveMutex>
#include <QVector>
#include <QThread>
#include <iostream>
#include <fstream>
#include "dsp/channelsamplesource.h"
#include "dsp/nco.h"
#include "dsp/ncof.h"
#include "dsp/interpolator.h"
#include "dsp/firfilter.h"
#include "dsp/filterrc.h"
#include "util/movingaverage.h"
#include "audio/audiofifo.h"
#include "m17modsettings.h"
class ChannelAPI;
class M17ModProcessor;
class BasebandSampleSink;
class M17ModSource : public QObject, public ChannelSampleSource
{
Q_OBJECT
public:
M17ModSource();
virtual ~M17ModSource();
virtual void pull(SampleVector::iterator begin, unsigned int nbSamples);
virtual void pullOne(Sample& sample);
virtual void prefetch(unsigned int nbSamples);
void setInputFileStream(std::ifstream *ifstream) { m_ifstream = ifstream; }
AudioFifo *getAudioFifo() { return &m_audioFifo; }
AudioFifo *getFeedbackAudioFifo() { return &m_feedbackAudioFifo; }
void applyAudioSampleRate(int sampleRate);
void applyFeedbackAudioSampleRate(int sampleRate);
int getAudioSampleRate() const { return m_audioSampleRate; }
int getFeedbackAudioSampleRate() const { return m_feedbackAudioSampleRate; }
void setChannel(ChannelAPI *channel) { m_channel = channel; }
double getMagSq() const { return m_magsq; }
void getLevels(qreal& rmsLevel, qreal& peakLevel, int& numSamples) const
{
rmsLevel = m_rmsLevel;
peakLevel = m_peakLevelOut;
numSamples = m_levelNbSamples;
}
void applySettings(const M17ModSettings& settings, const QList<QString>& settingsKeys, bool force = false);
void applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force = false);
void sendPacket();
private:
int m_channelSampleRate;
int m_channelFrequencyOffset;
M17ModSettings m_settings;
ChannelAPI *m_channel;
NCO m_carrierNco;
NCOF m_toneNco;
float m_modPhasor; //!< baseband modulator phasor
Complex m_modSample;
Interpolator m_interpolator;
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
bool m_interpolatorConsumed;
Interpolator m_feedbackInterpolator;
Real m_feedbackInterpolatorDistance;
Real m_feedbackInterpolatorDistanceRemain;
bool m_feedbackInterpolatorConsumed;
QVector<qint16> m_modBuffer;
int m_modBufferFill;
Lowpass<Real> m_lowpass;
double m_magsq;
MovingAverageUtil<double, double, 16> m_movingAverage;
int m_audioSampleRate;
AudioVector m_audioBuffer;
unsigned int m_audioBufferFill;
AudioVector m_audioReadBuffer;
unsigned int m_audioReadBufferFill;
unsigned int m_audioReadBufferIndex;
AudioFifo m_audioFifo;
bool m_m17PullAudio;
int m_m17PullCount;
bool m_m17PullBERT;
int m_feedbackAudioSampleRate;
AudioVector m_feedbackAudioBuffer;
uint m_feedbackAudioBufferFill;
AudioFifo m_feedbackAudioFifo;
quint32 m_levelCalcCount;
qreal m_rmsLevel;
qreal m_peakLevelOut;
Real m_peakLevel;
Real m_levelSum;
std::ifstream *m_ifstream;
M17ModProcessor *m_processor;
QThread m_processorThread;
HighPassFilterRC m_preemphasisFilter;
QRecursiveMutex m_mutex;
static const int m_levelNbSamples;
static const float m_preemphasis;
void processOneFeedbackSample(Complex& ci);
void pullAF(Real& sample, bool& carrier);
void pullM17(Real& sample, bool& carrier);
void pullAudio(unsigned int nbSamples);
void pushFeedback(Real sample);
void pushFeedback(std::array<int16_t, 1920>& audioFrame);
void calculateLevel(Real& sample);
void modulateSample();
private slots:
void handleAudio();
};
#endif // INCLUDE_M17MODSOURCE_H