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112 lines
4.8 KiB
C++
112 lines
4.8 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2019-2020 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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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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// (at your option) any later version. //
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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 INCLUDE_INTERFEROMETERCORR_H
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#define INCLUDE_INTERFEROMETERCORR_H
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#include <complex>
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#include <QObject>
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#include "dsp/dsptypes.h"
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#include "dsp/fftwindow.h"
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#include "interferometersettings.h"
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class FFTEngine;
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class InterferometerCorrelator : public QObject {
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Q_OBJECT
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public:
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InterferometerCorrelator(int fftSize);
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~InterferometerCorrelator();
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void setCorrType(InterferometerSettings::CorrelationType corrType) { m_corrType = corrType; }
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InterferometerSettings::CorrelationType getCorrType() const { return m_corrType; }
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bool performCorr( //!< Returns true if results were produced
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const SampleVector& data0,
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unsigned int size0,
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const SampleVector& data1,
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unsigned int size1
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);
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int getFullFFTSize() const { return 2*m_fftSize; }
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void setPhase(int phase);
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void setGain(int gainCB);
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SampleVector m_scorr; //!< raw correlation result (spectrum) - Sample vector expected
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SampleVector m_tcorr; //!< correlation result (time or spectrum inverse FFT) - Sample vector expected
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int m_processed; //!< number of samples processed at the end of correlation
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int m_remaining[2]; //!< number of samples remaining per member at the end of correlation
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signals:
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void dataReady(int start, int stop);
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private:
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bool performOpCorr( //!< Returns true if results were produced
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const SampleVector& data0,
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unsigned int size0,
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const SampleVector* data1,
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unsigned int size1,
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Sample sampleOp(const Sample& a, const Sample& b)
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);
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bool performIFFTCorr( //!< Returns true if results were produced
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const SampleVector& data0,
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unsigned int size0,
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const SampleVector* data1,
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unsigned int size1,
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bool star = false
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);
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bool performIFFT2Corr( //!< Returns true if results were produced
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const SampleVector& data0,
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unsigned int size0,
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const SampleVector* data1,
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unsigned int size1
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);
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bool performFFTProd( //!< Returns true if results were produced
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const SampleVector& data0,
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unsigned int size0,
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const SampleVector* data1,
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unsigned int size1
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);
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void adjustSCorrSize(int size);
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void adjustTCorrSize(int size);
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InterferometerSettings::CorrelationType m_corrType;
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unsigned int m_fftSize; //!< FFT length
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FFTEngine *m_fft[2]; //!< FFT engines (double FFT)
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FFTEngine *m_invFFT; //!< Inverse FFT engine (double FFT)
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FFTEngine *m_fft2[2]; //!< FFT engines
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FFTEngine *m_invFFT2; //!< Inverse FFT engine
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unsigned int m_fftSequences[2]; //!< FFT factory engine sequences
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unsigned int m_invFFTSequence; //!< Inverse FFT engine sequence
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unsigned int m_fft2Sequences[2]; //!< FFT engines sequences
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unsigned int m_invFFT2Sequence; //!< Inverse FFT engine sequence
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FFTWindow m_window; //!< FFT window
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std::complex<float> *m_dataj; //!< conjuate of FFT transform
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SampleVector m_data0w; //!< windowed data 0
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SampleVector m_data1w; //!< windowed data 1
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SampleVector m_data1p; //!< data1 with phase correction
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int m_scorrSize; //!< spectrum correlations vector size
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int m_tcorrSize; //!< time correlations vector size
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int m_phase; //!< phase correction
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int m_gainCB;
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double m_gain;
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int64_t m_sin; //!< scaled sine of phase correction
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int64_t m_cos; //!< scaled cosine of phase correction
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};
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#endif // INCLUDE_INTERFEROMETERCORR_H
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