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/* -*- c++ -*- */
/*
* Copyright 2004,2010,2012 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_endian_swap.h>
#include <gr_io_signature.h>
#include <volk/volk.h>
gr_endian_swap_sptr
gr_make_endian_swap (size_t item_size_bytes)
{
return gnuradio::get_initial_sptr(new gr_endian_swap (item_size_bytes));
}
gr_endian_swap::gr_endian_swap (size_t item_size_bytes)
: gr_sync_block ("gr_endian_swap",
gr_make_io_signature (1, 1, item_size_bytes),
gr_make_io_signature (1, 1, item_size_bytes))
{
const int alignment_multiple = volk_get_alignment();
set_alignment(std::max(1,alignment_multiple));
}
int
gr_endian_swap::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) );
if(is_unaligned()) {
switch(nbytes){
case 1:
memcpy(out,in,noutput_items);
break;
case 2:
memcpy(out,in,2*noutput_items);
volk_16u_byteswap_u((uint16_t*)out,noutput_items);
break;
case 4:
memcpy(out,in,4*noutput_items);
volk_32u_byteswap_u((uint32_t*)out,noutput_items);
break;
case 8:
memcpy(out,in,8*noutput_items);
volk_64u_byteswap_u((uint64_t*)out,noutput_items);
break;
default:
throw std::runtime_error("itemsize is not valid for gr_endian_swap!");
}
} else {
switch(nbytes){
case 1:
memcpy(out,in,noutput_items);
break;
case 2:
memcpy(out,in,2*noutput_items);
volk_16u_byteswap_a((uint16_t*)out,noutput_items);
break;
case 4:
memcpy(out,in,4*noutput_items);
volk_32u_byteswap_a((uint32_t*)out,noutput_items);
break;
case 8:
memcpy(out,in,8*noutput_items);
volk_64u_byteswap_a((uint64_t*)out,noutput_items);
break;
default:
throw std::runtime_error("itemsize is not valid for gr_endian_swap!");
}
}
return noutput_items;
}
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