adding gr_endian_swap block

5 files changed, 192 insertions, 0 deletions

diff --git a/gnuradio-core/src/lib/general/CMakeLists.txt b/gnuradio-core/src/lib/general/CMakeLists.txt
index 5c7b0f374..3cf7f74e4 100644
--- a/gnuradio-core/src/lib/general/CMakeLists.txt
+++ b/gnuradio-core/src/lib/general/CMakeLists.txt
@@ -207,6 +207,7 @@ set(gr_core_general_triple_threats
     gr_deinterleave
     gr_delay
     gr_encode_ccsds_27_bb
+    gr_endian_swap
     gr_fake_channel_coder_pp
     gr_feedforward_agc_cc
     gr_feval
diff --git a/gnuradio-core/src/lib/general/general.i b/gnuradio-core/src/lib/general/general.i
index c0ce65527..790549c4d 100644
--- a/gnuradio-core/src/lib/general/general.i
+++ b/gnuradio-core/src/lib/general/general.i
@@ -60,6 +60,7 @@
 #include <gr_complex_to_interleaved_short.h>
 #include <gr_interleaved_short_to_complex.h>
 //#include <gr_endianness.h>
+#include <gr_endian_swap.h>
 #include <gr_firdes.h>
 #include <gr_interleave.h>
 #include <gr_deinterleave.h>
@@ -181,6 +182,7 @@
 %include "gr_complex_to_xxx.i"
 %include "gr_complex_to_interleaved_short.i"
 //%include "gr_endianness.i"
+%include "gr_endian_swap.i"
 %include "gr_interleaved_short_to_complex.i"
 %include "gr_firdes.i"
 %include "gr_interleave.i"
diff --git a/gnuradio-core/src/lib/general/gr_endian_swap.cc b/gnuradio-core/src/lib/general/gr_endian_swap.cc
new file mode 100644
index 000000000..d86da5aa7
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_endian_swap.cc
@@ -0,0 +1,101 @@
+/* -*- 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( d_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;
+}
+
+
+
diff --git a/gnuradio-core/src/lib/general/gr_endian_swap.h b/gnuradio-core/src/lib/general/gr_endian_swap.h
new file mode 100644
index 000000000..0baa3f338
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_endian_swap.h
@@ -0,0 +1,57 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2012 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.
+ */
+
+#ifndef INCLUDED_GR_ENDIAN_SWAP_H
+#define INCLUDED_GR_ENDIAN_SWAP_H
+
+#include <gr_core_api.h>
+#include <gr_sync_block.h>
+
+class gr_endian_swap;
+typedef boost::shared_ptr<gr_endian_swap> gr_endian_swap_sptr;
+
+GR_CORE_API gr_endian_swap_sptr
+gr_make_endian_swap (size_t item_size_bytes=1);
+
+/*!
+ * \brief Convert stream of items into thier byte swapped version
+ *
+ * \param item_size_bytes number of bytes per item, 1=no-op,2=uint16_t,4=uint32_t,8=uint64_t
+ */
+
+class GR_CORE_API gr_endian_swap : public gr_sync_block
+{
+ private:
+  friend GR_CORE_API gr_endian_swap_sptr
+    gr_make_endian_swap (size_t item_size_bytes);
+  gr_endian_swap (size_t item_size_bytes);
+
+  size_t item_size_bytes;
+
+ public:
+  virtual int work (int noutput_items,
+		    gr_vector_const_void_star &input_items,
+		    gr_vector_void_star &output_items);
+};
+
+
+#endif /* INCLUDED_GR_ENDIAN_SWAP_H */
diff --git a/gnuradio-core/src/lib/general/gr_endian_swap.i b/gnuradio-core/src/lib/general/gr_endian_swap.i
new file mode 100644
index 000000000..6058b9de7
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_endian_swap.i
@@ -0,0 +1,31 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2012 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.
+ */
+
+GR_SWIG_BLOCK_MAGIC(gr,endian_swap)
+
+gr_endian_swap_sptr
+gr_make_endian_swap (size_t bytes_per_item=1);
+
+class gr_endian_swap : public gr_sync_block
+{
+public:
+};