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/* -*- c++ -*- */
/*
* Copyright 2004,2009,2010,2012,2018 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 "sub_impl.h"
#include <gnuradio/io_signature.h>
#include <volk/volk.h>
namespace gr {
namespace blocks {
template <class T>
typename sub<T>::sptr sub<T>::make(size_t vlen)
{
return gnuradio::get_initial_sptr(new sub_impl<T>(vlen));
}
template <>
sub_impl<float>::sub_impl(size_t vlen)
: sync_block("sub_ff",
io_signature::make(1, -1, sizeof(float) * vlen),
io_signature::make(1, 1, sizeof(float) * vlen)),
d_vlen(vlen)
{
const int alignment_multiple = volk_get_alignment() / sizeof(float);
set_alignment(std::max(1, alignment_multiple));
}
template <>
int sub_impl<float>::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
float* out = (float*)output_items[0];
int ninputs = input_items.size();
int noi = noutput_items * d_vlen;
const float* in = (const float*)input_items[0];
memcpy(out, in, noi * sizeof(float));
for (int i = 1; i < ninputs; i++) {
in = (const float*)input_items[i];
volk_32f_x2_subtract_32f(out, out, in, noi);
}
return noutput_items;
}
template <class T>
sub_impl<T>::sub_impl(size_t vlen)
: sync_block("sub",
io_signature::make(1, -1, sizeof(T) * vlen),
io_signature::make(1, 1, sizeof(T) * vlen)),
d_vlen(vlen)
{
}
template <class T>
int sub_impl<T>::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
T* optr = (T*)output_items[0];
int ninputs = input_items.size();
for (size_t i = 0; i < noutput_items * d_vlen; i++) {
T acc = ((T*)input_items[0])[i];
for (int j = 1; j < ninputs; j++)
acc -= ((T*)input_items[j])[i];
*optr++ = (T)acc;
}
return noutput_items;
}
template class sub<std::int16_t>;
template class sub<std::int32_t>;
template class sub<gr_complex>;
template class sub<float>;
} /* namespace blocks */
} /* namespace gr */
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