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/* -*- c++ -*- */
/*
* Copyright 2012 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 "char_to_float_impl.h"
#include <gr_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)
: gr_sync_block("char_to_float",
gr_make_io_signature (1, -1, sizeof(char)*vlen),
gr_make_io_signature (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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