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/* -*- c++ -*- */
/*
* Copyright 2004,2010,2012,2013 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 "endian_swap_impl.h"
#include <gnuradio/io_signature.h>
#include <volk/volk.h>
namespace gr {
namespace blocks {
endian_swap::sptr
endian_swap::make(size_t item_size_bytes)
{
return gnuradio::get_initial_sptr
(new endian_swap_impl(item_size_bytes));
}
endian_swap_impl::endian_swap_impl (size_t item_size_bytes)
: sync_block("endian_swap_impl",
io_signature::make(1, 1, item_size_bytes),
io_signature::make(1, 1, item_size_bytes))
{
const int alignment_multiple = volk_get_alignment();
set_alignment(std::max(1, alignment_multiple));
}
endian_swap_impl::~endian_swap_impl()
{
}
int
endian_swap_impl::work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const char *in = (const char*)input_items[0];
char *out = (char*)output_items[0];
int nbytes(output_signature()->sizeof_stream_item(0));
switch(nbytes){
case 1:
memcpy(out,in,noutput_items);
break;
case 2:
memcpy(out,in,2*noutput_items);
volk_16u_byteswap((uint16_t*)out,noutput_items);
break;
case 4:
memcpy(out,in,4*noutput_items);
volk_32u_byteswap((uint32_t*)out,noutput_items);
break;
case 8:
memcpy(out,in,8*noutput_items);
volk_64u_byteswap((uint64_t*)out,noutput_items);
break;
default:
throw std::runtime_error("itemsize is not valid for endian_swap!");
}
return noutput_items;
}
} /* namespace blocks */
} /* namespace gr */
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