kopia lustrzana https://github.com/f4exb/sdrangel
70 wiersze
3.0 KiB
C++
70 wiersze
3.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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// Copyright (C) 2015-2016, 2018-2019 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_NCOF_H
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#define INCLUDE_NCOF_H
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#include "dsp/dsptypes.h"
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#include "export.h"
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class SDRBASE_API NCOF {
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private:
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enum {
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TableSize = (1 << 12),
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};
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static Real m_table[TableSize+1];
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static bool m_tableInitialized;
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static float m_tableSizeLimit;
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static void initTable();
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Real m_phaseIncrement;
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Real m_phase;
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public:
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NCOF();
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void setFreq(Real freq, Real sampleRate);
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void setPhase(Real phase) { m_phase = phase; }
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int nextPhase() //!< Increment phase and return its integer value
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{
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m_phase += m_phaseIncrement;
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while(m_phase >= m_tableSizeLimit) {
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m_phase -= TableSize;
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}
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while(m_phase < 0.0) {
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m_phase += TableSize;
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}
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return (int) m_phase;
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}
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Real next(); //!< Return next real sample
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Complex nextIQ(); //!< Return next complex sample
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Complex nextIQ(float imbalance); //!< Return next complex sample with an imbalance factor on I
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Complex nextQI(); //!< Return next complex sample (reversed)
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Real get(); //!< Return current real sample (no phase increment)
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Complex getIQ(); //!< Return current complex sample (no phase increment)
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void getIQ(Complex& c); //!< Sets to the current complex sample (no phase increment)
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Complex getQI(); //!< Return current complex sample (no phase increment, reversed)
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void getQI(Complex& c); //!< Sets to the current complex sample (no phase increment, reversed)
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};
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#endif // INCLUDE_NCO_H
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