diff options
| author | Tom Rondeau <trondeau@vt.edu> | 2013-03-17 11:43:10 -0400 |
|---|---|---|
| committer | Tom Rondeau <trondeau@vt.edu> | 2013-03-17 11:43:10 -0400 |
| commit | ee2b700f72503d6e7f62adbfb7dff9997b9cb003 (patch) | |
| tree | 2c7e91d03fb5c605c6deebac9077c1bc41bce13d /gr-blocks/lib/endian_swap_impl.cc | |
| parent | f15400470ce5cb68f5339ead7af726b8bbafd364 (diff) | |
| parent | 65d88f0b28e233c82bc4f0c07072085a3d18c163 (diff) | |
Merge branch 'master' into next
Conflicts:
gr-blocks/swig/blocks_swig.i
Diffstat (limited to 'gr-blocks/lib/endian_swap_impl.cc')
| -rw-r--r-- | gr-blocks/lib/endian_swap_impl.cc | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/gr-blocks/lib/endian_swap_impl.cc b/gr-blocks/lib/endian_swap_impl.cc new file mode 100644 index 0000000000..7e67c30147 --- /dev/null +++ b/gr-blocks/lib/endian_swap_impl.cc @@ -0,0 +1,110 @@ +/* -*- 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 <gr_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) + : gr_sync_block("endian_swap_impl", + 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)); + } + + 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)); + 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 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 endian_swap!"); + } + } + + return noutput_items; + } + + } /* namespace blocks */ +} /* namespace gr */ |