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/* -*- c++ -*- */
/*
* Copyright 2015 Free Software Foundation, Inc.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_DTV_DVBT_OFDM_SYM_ACQUISITION_IMPL_H
#define INCLUDED_DTV_DVBT_OFDM_SYM_ACQUISITION_IMPL_H
#include <gnuradio/dtv/dvbt_ofdm_sym_acquisition.h>
#include <volk/volk_alloc.hh>
namespace gr {
namespace dtv {
class dvbt_ofdm_sym_acquisition_impl : public dvbt_ofdm_sym_acquisition
{
private:
const int d_fft_length;
const int d_cp_length;
const float d_rho;
volk::vector<gr_complex> d_conj;
volk::vector<float> d_norm;
volk::vector<gr_complex> d_corr;
volk::vector<gr_complex> d_gamma;
volk::vector<float> d_lambda;
// For peak detector
float d_threshold_factor_rise;
float d_avg_alpha;
float d_avg_min;
float d_avg_max;
float d_phase = 0.0;
double d_phaseinc = 0.0;
int d_cp_found = 0;
double d_nextphaseinc = 0;
int d_nextpos = 0;
int d_initial_acquisition = 0;
int d_cp_start = 0;
volk::vector<gr_complex> d_derot;
int d_to_consume = 0;
int d_to_out = 0;
int d_consumed = 0;
int d_out = 0;
int ml_sync(const gr_complex* in,
int lookup_start,
int lookup_stop,
int* cp_pos,
gr_complex* derot,
int* to_consume,
int* to_out);
int peak_detect_init(float threshold_factor_rise, float alpha);
int peak_detect_process(const float* datain,
const int datain_length,
int* peak_pos,
int* peak_max);
void send_sync_start();
void derotate(const gr_complex* in, gr_complex* out);
public:
dvbt_ofdm_sym_acquisition_impl(
int blocks, int fft_length, int occupied_tones, int cp_length, float snr);
~dvbt_ofdm_sym_acquisition_impl() override;
void forecast(int noutput_items, gr_vector_int& ninput_items_required) override;
int general_work(int noutput_items,
gr_vector_int& ninput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items) override;
};
} // namespace dtv
} // namespace gr
#endif /* INCLUDED_DTV_DVBT_OFDM_SYM_ACQUISITION_IMPL_H */
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