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/* -*- c++ -*- */
/*
* Copyright 2013-2021 Sylvain Munaut <tnt@246tNt.com>
*
* This file is part of gr-iqbalance
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gnuradio/io_signature.h>
#include <gnuradio/iqbalance/optimize_c.h>
#define GCC_VERSION ( \
__GNUC__ * 10000 + \
__GNUC_MINOR__ * 100 + \
__GNUC_PATCHLEVEL__ \
)
#if GCC_VERSION >= 40800 || defined(__clang__)
# define complex _Complex
# undef _GLIBCXX_HAVE_COMPLEX_H
#endif
extern "C" {
#include <osmocom/dsp/cxvec.h>
#include <osmocom/dsp/iqbal.h>
}
#define FFT_SIZE 1024
#define FFT_COUNT 4
namespace gr {
iqbalance::optimize_c::sptr
iqbalance::optimize_c::make(int period)
{
return gnuradio::get_initial_sptr (new iqbalance::optimize_c(period));
}
iqbalance::optimize_c::optimize_c(int period)
: gr::sync_block ("optimize_c",
gr::io_signature::make(1, 1, sizeof (gr_complex)),
gr::io_signature::make(0, 0, 0)),
d_period(period), d_count(0), d_first(true), d_mag(0.0f), d_phase(0.0f)
{
message_port_register_out(pmt::mp("iqbal_corr"));
}
iqbalance::optimize_c::~optimize_c()
{
/* Nothing to do */
}
void
iqbalance::optimize_c::forecast(int noutput_items, gr_vector_int &ninput_items_required)
{
unsigned ninputs = ninput_items_required.size ();
for (unsigned i = 0; i < ninputs; i++)
ninput_items_required[i] = FFT_SIZE * FFT_COUNT;
}
int
iqbalance::optimize_c::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const gr_complex *in = (const gr_complex *) input_items[0];
const int N = FFT_SIZE * FFT_COUNT;
struct osmo_cxvec _sig, *sig = &_sig;
struct osmo_iqbal_opts opts;
float p[2];
if (!this->d_period)
return noutput_items;
if (this->d_count) {
int missing = this->d_period - this->d_count;
if (missing <= 0) {
this->d_count = 0;
return 0;
} else if (missing >= noutput_items) {
this->d_count += noutput_items;
return noutput_items;
} else {
this->d_count = 0;
return missing;
}
}
if (noutput_items < N)
return 0;
this->d_count += N;
memcpy(&opts, &osmo_iqbal_default_opts, sizeof(opts));
opts.fft_size = FFT_SIZE;
opts.fft_count = FFT_COUNT;
opts.start_at_prev = 1;
p[0] = this->d_mag;
p[1] = this->d_phase;
osmo_cxvec_init_from_data(sig, (float complex *)in, N);
osmo_iqbal_cxvec_optimize(sig, &p[0], &p[1], &opts);
if (this->d_first) {
this->d_first = false;
this->d_mag = p[0];
this->d_phase = p[1];
} else {
this->d_mag = (0.95f * this->d_mag ) + (p[0] * 0.05f);
this->d_phase = (0.95f * this->d_phase) + (p[1] * 0.05f);
}
p[0] = this->d_mag;
p[1] = this->d_phase;
pmt::pmt_t msg = pmt::init_f32vector(2, p);
message_port_pub(pmt::mp("iqbal_corr"), msg);
return N;
}
} /* namespace gr */
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