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/* -*- c++ -*- */
/*
* Copyright 2022 Daniel Estevez <daniel@destevez.net>.
*
* This file is part of gr-satellites
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include "phase_unwrap_impl.h"
#include <gnuradio/io_signature.h>
#include <cstring>
// Output is (int64_t, float)
#define OUTPUT_SIZE (sizeof(int64_t) + sizeof(float))
namespace gr {
namespace satellites {
phase_unwrap::sptr phase_unwrap::make()
{
return gnuradio::make_block_sptr<phase_unwrap_impl>();
}
phase_unwrap_impl::phase_unwrap_impl()
: gr::sync_block("phase_unwrap",
gr::io_signature::make(1, 1, sizeof(float)),
gr::io_signature::make(1, 1, OUTPUT_SIZE)),
d_integer_cycles(0.0),
d_last_phase(GR_M_PI)
{
}
phase_unwrap_impl::~phase_unwrap_impl() {}
int phase_unwrap_impl::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
auto in = static_cast<const float*>(input_items[0]);
auto out = static_cast<uint8_t*>(output_items[0]);
for (int j = 0; j < noutput_items; ++j) {
float phase = phase_wrap(in[j]);
if ((d_last_phase < GR_M_PI / 2.0) && (phase > 3.0 * GR_M_PI / 2.0)) {
--d_integer_cycles;
} else if ((d_last_phase > 3.0 * GR_M_PI / 2.0) && (phase < GR_M_PI / 2.0)) {
++d_integer_cycles;
}
d_last_phase = phase;
std::memcpy(&out[j * OUTPUT_SIZE], &d_integer_cycles, sizeof(int64_t));
std::memcpy(&out[j * OUTPUT_SIZE + sizeof(int64_t)], &phase, sizeof(float));
}
return noutput_items;
}
} /* namespace satellites */
} /* namespace gr */
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