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sdrangel/plugins/channeltx/modfreedv/freedvmodsource.h
2024-04-20 19:10:18 +02:00

151 lines
5.0 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2019-2020 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
// Copyright (C) 2022 Jiří Pinkava <jiri.pinkava@rossum.ai> //
// //
// 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_FREEDVMODSOURCE_H
#define INCLUDE_FREEDVMODSOURCE_H
#include <QObject>
#include <QRecursiveMutex>
#include <iostream>
#include <fstream>
#include "dsp/channelsamplesource.h"
#include "dsp/ncof.h"
#include "dsp/interpolator.h"
#include "dsp/fftfilt.h"
#include "util/movingaverage.h"
#include "dsp/cwkeyer.h"
#include "audio/audiofifo.h"
#include "audio/audioresampler.h"
#include "freedvmodsettings.h"
class BasebandSampleSink;
class FreeDVModSource : public QObject, public ChannelSampleSource
{
Q_OBJECT
public:
FreeDVModSource();
virtual ~FreeDVModSource();
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; }
void applyAudioSampleRate(unsigned int sampleRate);
CWKeyer& getCWKeyer() { return m_cwKeyer; }
double getMagSq() const { return m_magsq; }
void getLevels(qreal& rmsLevel, qreal& peakLevel, int& numSamples) const
{
rmsLevel = m_rmsLevel;
peakLevel = m_peakLevelOut;
numSamples = m_levelNbSamples;
}
int getAudioSampleRate() const { return m_audioSampleRate; }
unsigned int getModemSampleRate() const { return m_modemSampleRate; }
Real getLowCutoff() const { return m_lowCutoff; }
Real getHiCutoff() const { return m_hiCutoff; }
void setSpectrumSink(BasebandSampleSink *sampleSink) { m_spectrumSink = sampleSink; }
void applySettings(const FreeDVModSettings& settings, bool force = false);
void applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force = false);
void applyFreeDVMode(FreeDVModSettings::FreeDVMode mode);
private:
int m_channelSampleRate;
int m_channelFrequencyOffset;
int m_modemSampleRate;
Real m_lowCutoff;
Real m_hiCutoff;
FreeDVModSettings m_settings;
NCOF m_carrierNco;
NCOF m_toneNco;
Complex m_modSample;
Interpolator m_interpolator;
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
bool m_interpolatorConsumed;
fftfilt* m_SSBFilter;
Complex* m_SSBFilterBuffer;
int m_SSBFilterBufferIndex;
static const int m_ssbFftLen;
BasebandSampleSink* m_spectrumSink;
SampleVector m_sampleBuffer;
fftfilt::cmplx m_sum;
int m_undersampleCount;
int m_sumCount;
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;
AudioFifo m_audioFifo;
quint32 m_levelCalcCount;
qreal m_rmsLevel;
qreal m_peakLevelOut;
Real m_peakLevel;
Real m_levelSum;
std::ifstream *m_ifstream;
CWKeyer m_cwKeyer;
struct freedv *m_freeDV;
int m_nSpeechSamples;
int m_nNomModemSamples;
int m_iSpeech;
int m_iModem;
int16_t *m_speechIn;
int16_t *m_modOut;
float m_scaleFactor; //!< divide by this amount to scale from int16 to float in [-1.0, 1.0] interval
AudioResampler m_audioResampler;
QRecursiveMutex m_mutex;
static const int m_levelNbSamples;
void processOneSample(Complex& ci);
void pullAF(Complex& sample);
void pullAudio(unsigned int nbSamples);
qint16 getAudioSample();
void pushFeedback(Real sample);
void calculateLevel(Complex& sample);
void calculateLevel(qint16& sample);
void modulateSample();
private slots:
void handleAudio();
};
#endif // INCLUDE_FREEDVMODSOURCE_H