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/* -*- c++ -*- */
/*
* Copyright 2015,2018 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef BURST_SHAPER_IMPL_H
#define BURST_SHAPER_IMPL_H
#include <gnuradio/digital/burst_shaper.h>
namespace gr {
namespace digital {
template <class T>
class burst_shaper_impl : public burst_shaper<T>
{
protected:
enum state_t {
STATE_WAIT,
STATE_PREPAD,
STATE_RAMPUP,
STATE_COPY,
STATE_RAMPDOWN,
STATE_POSTPAD
};
private:
const std::vector<T> d_up_ramp;
const std::vector<T> d_down_ramp;
const int d_nprepad;
const int d_npostpad;
const bool d_insert_phasing;
const pmt::pmt_t d_length_tag_key;
std::vector<T> d_up_phasing;
std::vector<T> d_down_phasing;
int d_ncopy;
int d_limit;
int d_index;
uint64_t d_length_tag_offset;
bool d_finished;
state_t d_state;
void write_padding(T*& dst, int& nwritten, int nspace);
void copy_items(T*& dst, const T*& src, int& nwritten, int& nread, int nspace);
void apply_ramp(T*& dst, const T*& src, int& nwritten, int& nread, int nspace);
void add_length_tag(int offset);
void propagate_tags(int in_offset, int out_offset, int count, bool skip = true);
void enter_wait();
void enter_prepad();
void enter_rampup();
void enter_copy();
void enter_rampdown();
void enter_postpad();
public:
burst_shaper_impl(const std::vector<T>& taps,
int pre_padding,
int post_padding,
bool insert_phasing,
const std::string& length_tag_name);
~burst_shaper_impl();
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;
int pre_padding() const { return d_nprepad; }
int post_padding() const { return d_npostpad; }
int prefix_length() const;
int suffix_length() const;
};
} // namespace digital
} // namespace gr
#endif /* BURST_SHAPER_IMPL_H */
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