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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 "float_to_int_impl.h"
#include "float_array_to_int.h"
#include <gr_io_signature.h>
#include <volk/volk.h>
namespace gr {
namespace blocks {
float_to_int::sptr float_to_int::make(size_t vlen, float scale)
{
return gnuradio::get_initial_sptr(new float_to_int_impl(vlen, scale));
}
float_to_int_impl::float_to_int_impl(size_t vlen, float scale)
: gr_sync_block("float_to_int",
gr_make_io_signature (1, 1, sizeof(float)*vlen),
gr_make_io_signature (1, 1, sizeof(int)*vlen)),
d_vlen(vlen), d_scale(scale)
{
const int alignment_multiple =
volk_get_alignment() / sizeof(int);
set_alignment(std::max(1, alignment_multiple));
}
int
float_to_int_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
// Disable the Volk for now. There is a problem for large 32-bit ints that
// are not properly represented by the precisions of a single float, which
// can cause wrapping from large, positive numbers to negative.
// In gri_float_to_int, the value is first promoted to a 64-bit
// value, clipped, then converted to a float.
#if 0
const float *in = (const float *) input_items[0];
int32_t *out = (int32_t *) output_items[0];
if(is_unaligned()) {
volk_32f_s32f_convert_32i_u(out, in, d_scale, d_vlen*noutput_items);
}
else {
volk_32f_s32f_convert_32i_a(out, in, d_scale, d_vlen*noutput_items);
}
#else
const float *in = (const float *) input_items[0];
int *out = (int *) output_items[0];
float_array_to_int (in, out, d_scale, d_vlen*noutput_items);
#endif
return noutput_items;
}
} /* namespace blocks */
}/* namespace gr */
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