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/*
* Copyright (C) 2003,2004 by Jonathan Naylor G4KLX
*
* 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; either version 2 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "NCO.h"
#include <cmath>
using namespace std;
#include <wx/log.h>
#include <wx/debug.h>
CNCO::CNCO(int rate, double volume) :
m_rate(rate),
m_volume(volume),
m_phase(0.0)
{
wxASSERT(m_rate > 0);
wxASSERT(m_volume >= -1.0 && volume <= 1.0);
}
CNCO::~CNCO()
{
}
void CNCO::setPhase(double phase)
{
m_phase = phase;
}
double CNCO::getPhase() const
{
return m_phase;
}
void CNCO::generate(double frequency, double* output, int length)
{
wxASSERT(output != NULL);
wxASSERT(length > 0);
double phaseInc = (::fabs(frequency) * 2.0 * M_PI) / double(m_rate);
for (int i = 0; i < length; i++) {
output[i] = ::sin(m_phase) * m_volume;
m_phase += phaseInc;
}
}
void CNCO::generate(double frequency, complex<double>* output, int length)
{
wxASSERT(output != NULL);
wxASSERT(length > 0);
double phaseInc = (::fabs(frequency) * 2.0 * M_PI) / double(m_rate);
for (int i = 0; i < length; i++) {
double cosVal = ::cos(m_phase) * m_volume;
double sinVal = ::sin(m_phase) * m_volume;
m_phase += phaseInc;
if (frequency < 0.0)
output[i] = complex<double>(sinVal, cosVal);
else
output[i] = complex<double>(cosVal, sinVal);
}
}
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