Hamlib/gnuradio/ssb.h

80 wiersze
2.4 KiB
C++

/*
* Hamlib GNUradio backend - SSB class
* Copyright (c) 2003 by Stephane Fillod
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef _SSB_H
#define _SSB_H 1
#include "demod.h"
#include <GrSSBMod.h> /* SSB */
class USBDemodChainCF : public DemodChainCF {
private:
GrSSBMod<d_oType> *s_demod;
float low_cutoff;
public:
USBDemodChainCF (VrSource<d_iType> *src, VrSink<d_oType> *snk, rmode_t mode, pbwidth_t width, int input_rate, freq_t centerfreq = 0) :
DemodChainCF(src, snk, mode, width, input_rate, centerfreq) {
low_cutoff = 300;
// centerfreq, relative to IF_center_freq
centerfreq += (freq_t)(low_cutoff + width/2);
s_demod = new GrSSBMod<d_oType>(2*M_PI*(low_cutoff+width/2)/(double)input_rate,1.0);
demod_in = demod_out = s_demod;
}
~USBDemodChainCF() { delete s_demod; }
//void setWidth(pbwidth_t width) { }
void setFreq(freq_t centerfreq) { s_demod->set_freq(centerfreq); }
void setRFgain(float gain) { s_demod->set_gain(gain); }
};
class LSBDemodChainCF : public DemodChainCF {
private:
GrSSBMod<d_oType> *s_demod;
float low_cutoff;
public:
LSBDemodChainCF (VrSource<d_iType> *src, VrSink<d_oType> *snk, rmode_t mode, pbwidth_t width, int input_rate, freq_t centerfreq = 0) :
DemodChainCF(src, snk, mode, width, input_rate, centerfreq) {
float low_cutoff = 300;
// centerfreq, relative to IF_center_freq
centerfreq += (freq_t)(-low_cutoff - width/2);
s_demod = new GrSSBMod<d_oType>(-2*M_PI*(low_cutoff+width/2)/(double)input_rate,1.0);
demod_in = demod_out = s_demod;
}
~LSBDemodChainCF() { delete s_demod; }
//void setWidth(pbwidth_t width) { }
void setFreq(freq_t centerfreq) { s_demod->set_freq(centerfreq); }
void setRFgain(float gain) { s_demod->set_gain(gain); }
};
#endif /* _SSB_H */