mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-14 12:22:00 -05:00
64 lines
2.6 KiB
C++
64 lines
2.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
|
|
// written by Christian Daniel //
|
|
// //
|
|
// 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 //
|
|
// //
|
|
// 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_NCO_H
|
|
#define INCLUDE_NCO_H
|
|
|
|
#include "dsp/dsptypes.h"
|
|
#include "export.h"
|
|
|
|
class SDRBASE_API NCO {
|
|
private:
|
|
enum {
|
|
TableSize = (1 << 12),
|
|
};
|
|
static Real m_table[TableSize];
|
|
static bool m_tableInitialized;
|
|
|
|
static void initTable();
|
|
|
|
int m_phaseIncrement;
|
|
int m_phase;
|
|
|
|
public:
|
|
NCO();
|
|
|
|
void setFreq(Real freq, Real sampleRate);
|
|
void setPhase(int phase) { m_phase = phase; }
|
|
|
|
void nextPhase() //!< Increment phase
|
|
{
|
|
m_phase += m_phaseIncrement;
|
|
while(m_phase >= TableSize)
|
|
m_phase -= TableSize;
|
|
while(m_phase < 0)
|
|
m_phase += TableSize;
|
|
}
|
|
|
|
Real next(); //!< Return next real sample
|
|
Complex nextIQ(); //!< Return next complex sample
|
|
Complex nextQI(); //!< Return next complex sample (reversed)
|
|
void nextIQMul(Real& i, Real& q); //!< multiply I,Q separately with next sample
|
|
Real get(); //!< Return current real sample (no phase increment)
|
|
Complex getIQ(); //!< Return current complex sample (no phase increment)
|
|
void getIQ(Complex& c); //!< Sets to the current complex sample (no phase increment)
|
|
Complex getQI(); //!< Return current complex sample (no phase increment, reversed)
|
|
void getQI(Complex& c); //!< Sets to the current complex sample (no phase increment, reversed)
|
|
};
|
|
|
|
#endif // INCLUDE_NCO_H
|