99 lines
3.3 KiB
C++
99 lines
3.3 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2020
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* Federico "Larroca" La Rocca <flarroca@fing.edu.uy>
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*
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* Instituto de Ingenieria Electrica, Facultad de Ingenieria,
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* Universidad de la Republica, Uruguay.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef INCLUDED_TEMPEST_SAMPLING_SYNCHRONIZATION_IMPL_H
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#define INCLUDED_TEMPEST_SAMPLING_SYNCHRONIZATION_IMPL_H
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#include <tempest/sampling_synchronization.h>
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#include <gnuradio/filter/mmse_fir_interpolator_cc.h>
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#include <random>
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namespace gr {
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namespace tempest {
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class sampling_synchronization_impl : public sampling_synchronization
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{
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private:
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int d_Htotal;
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//the number of lines to consider for correlation
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int d_no_of_lines_for_corr;
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// the maximum number of pixels I'll search for the peak
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int d_max_deviation_px;
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// the maximum number of pixels I'll search for the peak in percentaje
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float d_max_deviation;
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// the estimated interpolation I'd have to use to have a correct sampling - 1
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double d_samp_inc_remainder;
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// a manual correction assigned by the user at run-time
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double d_samp_inc_correction;
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double d_samp_phase;
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float d_new_interpolation_ratio;
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float d_alpha_samp_inc;
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// to accelerate the process, I'll only update the interpolation
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// once every a random number of iterations with probability d_portion
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std::uniform_real_distribution<float> d_dist;
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std::minstd_rand d_gen;
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float d_proba_of_updating;
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// the correlation
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gr_complex * d_historic_corr;
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float * d_abs_historic_corr;
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gr_complex * d_current_corr;
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gr_complex * d_in_conj;
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float d_alpha_corr;
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// the interpolating filter
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gr::filter::mmse_fir_interpolator_cc d_inter;
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void update_interpolation_ratio(const float * datain, const int datain_length);
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int interpolate_input(const gr_complex * in, gr_complex * out, int size);
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public:
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sampling_synchronization_impl(int Htotal, double manual_correction);
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~sampling_synchronization_impl();
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void set_Htotal(int Htotal);
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void set_manual_correction(double correction);
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// Where all the action really happens
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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,
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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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};
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} // namespace tempest
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} // namespace gr
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#endif /* INCLUDED_TEMPEST_SAMPLING_SYNCHRONIZATION_IMPL_H */
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