mirror of https://github.com/gnss-sdr/gnss-sdr
93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
/*!
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* \file direct_resampler_conditioner_cc.h
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*
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* \brief Nearest neighborhood resampler with
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* gr_complex input and gr_complex output
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* \author Luis Esteve, 2011. luis(at)epsilon-formacion.com
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*
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* This block takes in a signal stream and performs direct
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* resampling.
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* The theory behind this block can be found in Chapter 7.5 of
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* the following book.
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*
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_DIRECT_RESAMPLER_CONDITIONER_CC_H
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#define GNSS_SDR_DIRECT_RESAMPLER_CONDITIONER_CC_H
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#include <gnuradio/block.h>
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#include <cstdint>
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#if GNURADIO_USES_STD_POINTERS
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#include <memory>
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#else
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#include <boost/shared_ptr.hpp>
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#endif
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class direct_resampler_conditioner_cc;
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#if GNURADIO_USES_STD_POINTERS
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using direct_resampler_conditioner_cc_sptr = std::shared_ptr<direct_resampler_conditioner_cc>;
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#else
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using direct_resampler_conditioner_cc_sptr = boost::shared_ptr<direct_resampler_conditioner_cc>;
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#endif
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direct_resampler_conditioner_cc_sptr direct_resampler_make_conditioner_cc(
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double sample_freq_in,
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double sample_freq_out);
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/*!
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* \brief This class implements a direct resampler conditioner for complex data
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*
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* Direct resampling without interpolation
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*/
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class direct_resampler_conditioner_cc : public gr::block
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{
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public:
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~direct_resampler_conditioner_cc() = default;
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inline unsigned int sample_freq_in() const
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{
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return d_sample_freq_in;
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}
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inline unsigned int sample_freq_out() const
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{
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return d_sample_freq_out;
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}
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void forecast(int noutput_items, gr_vector_int &ninput_items_required);
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int general_work(int noutput_items, gr_vector_int &ninput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items);
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private:
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friend direct_resampler_conditioner_cc_sptr direct_resampler_make_conditioner_cc(
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double sample_freq_in,
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double sample_freq_out);
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direct_resampler_conditioner_cc(
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double sample_freq_in,
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double sample_freq_out);
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double d_sample_freq_in; // Sampling frequency of the input signal
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double d_sample_freq_out; // Sampling frequency of the output signal
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uint32_t d_phase;
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uint32_t d_lphase;
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uint32_t d_phase_step;
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};
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#endif // GNSS_SDR_DIRECT_RESAMPLER_CONDITIONER_CC_H
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