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/* -*- c++ -*- */
/*
* Copyright 2014 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "puncture_bb_impl.h"
#include <gnuradio/io_signature.h>
#include <pmt/pmt.h>
#include <volk/volk.h>
#include <cstdio>
#include <string>
namespace gr {
namespace fec {
puncture_bb::sptr puncture_bb::make(int puncsize, int puncpat, int delay)
{
return gnuradio::make_block_sptr<puncture_bb_impl>(puncsize, puncpat, delay);
}
puncture_bb_impl::puncture_bb_impl(int puncsize, int puncpat, int delay)
: block("puncture_bb",
io_signature::make(1, 1, sizeof(char)),
io_signature::make(1, 1, sizeof(char))),
d_puncsize(puncsize),
d_delay(delay)
{
// Create a mask of all 1's of puncsize length
int mask = 0;
for (int i = 0; i < d_puncsize; i++)
mask |= 1 << i;
// Rotate the pattern for the delay value; then mask it if there
// are any excess 1's in the pattern.
for (int i = 0; i < d_delay; ++i) {
puncpat = ((puncpat & 1) << (d_puncsize - 1)) + (puncpat >> 1);
}
d_puncpat = puncpat & mask;
// Calculate the number of holes in the pattern. The mask is all
// 1's given puncsize and puncpat is a pattern with >= puncsize
// 0's (masked to ensure this). The difference between the
// number of 1's in the mask and the puncpat is the number of
// holes.
uint32_t count_mask = 0, count_pat = 0;
volk_32u_popcnt(&count_mask, static_cast<uint32_t>(mask));
volk_32u_popcnt(&count_pat, static_cast<uint32_t>(d_puncpat));
d_puncholes = count_mask - count_pat;
set_fixed_rate(true);
set_relative_rate((uint64_t)(d_puncsize - d_puncholes), (uint64_t)d_puncsize);
set_output_multiple(d_puncsize - d_puncholes);
// set_msg_handler(<portname>, [this](pmt::pmt_t msg) { this->catch_msg(msg); });
}
puncture_bb_impl::~puncture_bb_impl() {}
int puncture_bb_impl::fixed_rate_ninput_to_noutput(int ninput)
{
return std::lround(((d_puncsize - d_puncholes) / (double)(d_puncsize)) * ninput);
}
int puncture_bb_impl::fixed_rate_noutput_to_ninput(int noutput)
{
return std::lround((d_puncsize / (double)(d_puncsize - d_puncholes)) * noutput);
}
void puncture_bb_impl::forecast(int noutput_items, gr_vector_int& ninput_items_required)
{
ninput_items_required[0] =
std::lround((d_puncsize / (double)(d_puncsize - d_puncholes)) * noutput_items);
}
/*
void
puncture_bb_impl::catch_msg(pmt::pmt_t msg)
{
long mlong = pmt::pmt_to_long(msg);
for(int i = 0; i < mlong; ++i) {
d_puncholes = (d_puncholes >> 1) | ((d_puncholes & 1) << (d_puncsize - 1));
}
}
*/
int puncture_bb_impl::general_work(int noutput_items,
gr_vector_int& ninput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
const char* in = (const char*)input_items[0];
char* out = (char*)output_items[0];
for (int i = 0, k = 0; i < noutput_items / output_multiple(); ++i) {
for (int j = 0; j < d_puncsize; ++j) {
if ((d_puncpat >> (d_puncsize - 1 - j)) & 1) {
out[k++] = in[i * d_puncsize + j];
}
}
}
/*
GR_LOG_DEBUG(d_debug_logger, ">>>>>> start");
for(int i = 0, k=0; i < noutput_items; ++i) {
if((d_puncpat >> (d_puncsize - 1 - (i % d_puncsize))) & 1) {
GR_LOG_DEBUG(d_debug_logger, boost::format("%1%...%2%") \
% out[k++] % in[i]);
}
else {
GR_LOG_DEBUG(d_debug_logger, boost::format("snit %1%") % in[i]);
}
}
GR_LOG_DEBUG(d_debug_logger, boost::format("comp: %1%, %2%\n") \
% noutput_items % ninput_items[0]);
GR_LOG_DEBUG(d_debug_logger, boost::format("consuming %1%") \
% ((int)(((1.0/relative_rate()) * noutput_items) + .5)));
*/
consume_each(std::lround((1.0 / relative_rate()) * noutput_items));
return noutput_items;
}
} /* namespace fec */
} /* namespace gr */
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