From a792bb88f3c3caa347506503de973aafaf78e0af Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Sat, 16 Mar 2013 19:30:59 -0400
Subject: blocks: moving copy, endian_swap, head, skiphead,
vector_source/sink/insert to gr-blocks.
---
gr-blocks/lib/endian_swap_impl.cc | 110 ++++++++++++++++++++++++++++++++++++++
1 file changed, 110 insertions(+)
create mode 100644 gr-blocks/lib/endian_swap_impl.cc
(limited to 'gr-blocks/lib/endian_swap_impl.cc')
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 */
--
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