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/* -*- c++ -*- */
/*
* Copyright 2004,2006,2013,2018 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "unpacked_to_packed_impl.h"
#include <gnuradio/io_signature.h>
#include <assert.h>
namespace gr {
namespace blocks {
template <class T>
typename unpacked_to_packed<T>::sptr
unpacked_to_packed<T>::make(unsigned int bits_per_chunk, endianness_t endianness)
{
return gnuradio::get_initial_sptr(
new unpacked_to_packed_impl<T>(bits_per_chunk, endianness));
}
template <class T>
unpacked_to_packed_impl<T>::unpacked_to_packed_impl(unsigned int bits_per_chunk,
endianness_t endianness)
: block("unpacked_to_packed",
io_signature::make(1, -1, sizeof(T)),
io_signature::make(1, -1, sizeof(T))),
d_bits_per_chunk(bits_per_chunk),
d_endianness(endianness),
d_index(0)
{
assert(bits_per_chunk <= d_bits_per_type);
assert(bits_per_chunk > 0);
this->set_relative_rate((uint64_t)bits_per_chunk, (uint64_t)this->d_bits_per_type);
}
template <class T>
unpacked_to_packed_impl<T>::~unpacked_to_packed_impl()
{
}
template <class T>
void unpacked_to_packed_impl<T>::forecast(int noutput_items,
gr_vector_int& ninput_items_required)
{
int input_required =
(int)ceil((d_index + noutput_items * 1.0 * d_bits_per_type) / d_bits_per_chunk);
unsigned ninputs = ninput_items_required.size();
for (unsigned int i = 0; i < ninputs; i++) {
ninput_items_required[i] = input_required;
}
}
template <class T>
unsigned int unpacked_to_packed_impl<T>::get_bit_be1(const T* in_vector,
unsigned int bit_addr,
unsigned int bits_per_chunk)
{
unsigned int byte_addr = (int)bit_addr / bits_per_chunk;
T x = in_vector[byte_addr];
unsigned int residue = bit_addr - byte_addr * bits_per_chunk;
// printf("Bit addr %d byte addr %d residue %d val
// %d\n",bit_addr,byte_addr,residue,(x>>(bits_per_chunk-1-residue))&1);
return (x >> (bits_per_chunk - 1 - residue)) & 1;
}
template <class T>
int unpacked_to_packed_impl<T>::general_work(int noutput_items,
gr_vector_int& ninput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
unsigned int index_tmp = d_index;
assert(input_items.size() == output_items.size());
int nstreams = input_items.size();
for (int m = 0; m < nstreams; m++) {
const T* in = (T*)input_items[m];
T* out = (T*)output_items[m];
index_tmp = d_index;
// per stream processing
// assert((ninput_items[m]-d_index)*d_bits_per_chunk >=
// noutput_items*d_bits_per_type);
switch (d_endianness) {
case GR_MSB_FIRST:
for (int i = 0; i < noutput_items; i++) {
T tmp = 0;
for (unsigned int j = 0; j < d_bits_per_type; j++) {
tmp = (tmp << 1) | get_bit_be1(in, index_tmp, d_bits_per_chunk);
index_tmp++;
}
out[i] = tmp;
}
break;
case GR_LSB_FIRST:
for (int i = 0; i < noutput_items; i++) {
unsigned long tmp = 0;
for (unsigned int j = 0; j < d_bits_per_type; j++) {
tmp = (tmp >> 1) | (get_bit_be1(in, index_tmp, d_bits_per_chunk)
<< (d_bits_per_type - 1));
index_tmp++;
}
out[i] = tmp;
}
break;
default:
assert(0);
}
}
d_index = index_tmp;
this->consume_each((int)(d_index / d_bits_per_chunk));
d_index = d_index % d_bits_per_chunk;
return noutput_items;
}
template class unpacked_to_packed<std::uint8_t>;
template class unpacked_to_packed<std::int16_t>;
template class unpacked_to_packed<std::int32_t>;
} /* namespace blocks */
} /* namespace gr */
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