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/* -*- c++ -*- */
/*
* Copyright 2004,2010-2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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 3, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "frequency_modulator_fc_impl.h"
#include <gr_io_signature.h>
#include <gr_fxpt.h>
#include <math.h>
#include <boost/math/special_functions/trunc.hpp>
namespace gr {
namespace analog {
frequency_modulator_fc::sptr
frequency_modulator_fc::make(double sensitivity)
{
return gnuradio::get_initial_sptr
(new frequency_modulator_fc_impl(sensitivity));
}
frequency_modulator_fc_impl::frequency_modulator_fc_impl(double sensitivity)
: gr_sync_block("frequency_modulator_fc",
gr_make_io_signature(1, 1, sizeof(float)),
gr_make_io_signature(1, 1, sizeof(gr_complex))),
d_sensitivity(sensitivity), d_phase(0)
{
}
frequency_modulator_fc_impl::~frequency_modulator_fc_impl()
{
}
int
frequency_modulator_fc_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const float *in = (const float*)input_items[0];
gr_complex *out = (gr_complex*)output_items[0];
for(int i = 0; i < noutput_items; i++) {
d_phase = d_phase + d_sensitivity * in[i];
while(d_phase > (float)(M_PI))
d_phase -= (float)(2.0 * M_PI);
while(d_phase < (float)(-M_PI))
d_phase += (float)(2.0 * M_PI);
float oi, oq;
gr_int32 angle = gr_fxpt::float_to_fixed (d_phase);
gr_fxpt::sincos(angle, &oq, &oi);
out[i] = gr_complex(oi, oq);
}
return noutput_items;
}
} /* namespace analog */
} /* namespace gr */
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