Merged r4518:5130 from developer branch n4hy/ofdm into trunk, passes distcheck.

Adds incomplete OFDM implementation, further work to be completed in the
features/ofdm branch.


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@5131 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 63 insertions, 0 deletions

diff --git a/gnuradio-core/src/lib/general/gr_delay.cc b/gnuradio-core/src/lib/general/gr_delay.cc
new file mode 100644
index 000000000..12c50e4b6
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_delay.cc
@@ -0,0 +1,63 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2007 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 2, 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_delay.h>
+#include <gr_io_signature.h>
+
+gr_delay_sptr
+gr_make_delay (size_t itemsize, int delay)
+{
+  return gr_delay_sptr (new gr_delay (itemsize, delay));
+}
+
+gr_delay::gr_delay (size_t itemsize, int delay)
+  : gr_sync_block ("delay",
+		   gr_make_io_signature (1, -1, itemsize),
+		   gr_make_io_signature (1, -1, itemsize)),
+    d_itemsize(itemsize)
+{
+  set_delay(delay);
+}
+
+int
+gr_delay::work (int noutput_items,
+		gr_vector_const_void_star &input_items,
+		gr_vector_void_star &output_items)
+{
+  assert(input_items.size() == output_items.size());
+
+  const char *iptr;
+  char *optr;
+
+  for(int i = 0; i < input_items.size(); i++) {
+    iptr = (const char *) input_items[i];
+    optr = (char *) output_items[i];
+
+    memcpy(optr, iptr + delay()*d_itemsize, noutput_items*d_itemsize);
+  }
+  
+  return noutput_items;
+}