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/* -*- c++ -*- */
/*
* Copyright 2004,2005,2010,2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "quadrature_demod_cf_impl.h"
#include <gnuradio/io_signature.h>
#include <gnuradio/math.h>
#include <volk/volk.h>
namespace gr {
namespace analog {
quadrature_demod_cf::sptr quadrature_demod_cf::make(float gain)
{
return gnuradio::make_block_sptr<quadrature_demod_cf_impl>(gain);
}
quadrature_demod_cf_impl::quadrature_demod_cf_impl(float gain)
: sync_block("quadrature_demod_cf",
io_signature::make(1, 1, sizeof(gr_complex)),
io_signature::make(1, 1, sizeof(float))),
d_gain(gain)
{
const int alignment_multiple = volk_get_alignment() / sizeof(gr_complex);
set_alignment(std::max(1, alignment_multiple));
set_history(2); // we need to look at the previous value
}
quadrature_demod_cf_impl::~quadrature_demod_cf_impl() {}
int quadrature_demod_cf_impl::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
gr_complex* in = (gr_complex*)input_items[0];
float* out = (float*)output_items[0];
std::vector<gr_complex> tmp(noutput_items);
volk_32fc_x2_multiply_conjugate_32fc(&tmp[0], &in[1], &in[0], noutput_items);
for (int i = 0; i < noutput_items; i++) {
out[i] = d_gain * gr::fast_atan2f(imag(tmp[i]), real(tmp[i]));
}
return noutput_items;
}
} /* namespace analog */
} /* namespace gr */
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