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/* -*- c++ -*- */
/*
* Copyright 2011,2012 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 <gr_float_to_int.h>
#include <gr_io_signature.h>
#include <gri_float_to_int.h>
#include <volk/volk.h>
gr_float_to_int_sptr
gr_make_float_to_int (size_t vlen, float scale)
{
return gnuradio::get_initial_sptr(new gr_float_to_int (vlen, scale));
}
gr_float_to_int::gr_float_to_int (size_t vlen, float scale)
: gr_sync_block ("gr_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));
}
float
gr_float_to_int::scale() const
{
return d_scale;
}
void
gr_float_to_int::set_scale(float scale)
{
d_scale = scale;
}
int
gr_float_to_int::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];
gri_float_to_int (in, out, d_scale, d_vlen*noutput_items);
#endif
return noutput_items;
}
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