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/* -*- c++ -*- */
/*
* Copyright 2012 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 "char_to_float_impl.h"
#include <gnuradio/io_signature.h>
#include <volk/volk.h>
namespace gr {
namespace blocks {
char_to_float::sptr char_to_float::make(size_t vlen, float scale)
{
return gnuradio::get_initial_sptr(new char_to_float_impl(vlen, scale));
}
char_to_float_impl::char_to_float_impl(size_t vlen, float scale)
: sync_block("char_to_float",
io_signature::make(1, -1, sizeof(char) * vlen),
io_signature::make(1, 1, sizeof(float) * vlen)),
d_vlen(vlen),
d_scale(scale)
{
const int alignment_multiple = volk_get_alignment() / sizeof(float);
set_alignment(std::max(1, alignment_multiple));
}
int char_to_float_impl::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
const int8_t* in = (const int8_t*)input_items[0];
float* out = (float*)output_items[0];
// Note: the unaligned benchmarked much faster than the aligned
volk_8i_s32f_convert_32f_u(out, in, d_scale, d_vlen * noutput_items);
return noutput_items;
}
} /* namespace blocks */
} /* namespace gr */
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