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 */