1 files changed, 76 insertions, 0 deletions
diff --git a/gr-blocks/lib/interleave_impl.cc b/gr-blocks/lib/interleave_impl.cc
new file mode 100644
index 000000000..df37ed26d
--- /dev/null
+++ b/gr-blocks/lib/interleave_impl.cc
@@ -0,0 +1,76 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 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 "interleave_impl.h"
+#include <gr_io_signature.h>
+
+namespace gr {
+  namespace blocks {
+
+    interleave::sptr interleave::make(size_t itemsize)
+    {
+      return gnuradio::get_initial_sptr(new interleave_impl(itemsize));
+    }
+
+    interleave_impl::interleave_impl(size_t itemsize)
+      : gr_sync_interpolator("interleave",
+			     gr_make_io_signature (1, gr_io_signature::IO_INFINITE, itemsize),
+			     gr_make_io_signature (1, 1, itemsize),
+			     1),
+	d_itemsize(itemsize)
+    {
+    }
+
+    bool
+    interleave_impl::check_topology(int ninputs, int noutputs)
+    {
+      set_interpolation(ninputs);
+      return true;
+    }
+
+    int
+    interleave_impl::work(int noutput_items,
+			  gr_vector_const_void_star &input_items,
+			  gr_vector_void_star &output_items)
+    {
+      size_t nchan = input_items.size();
+      size_t itemsize = d_itemsize;
+      const char **in = (const char **)&input_items[0];
+      char *out = (char *)output_items[0];
+      
+      for (int i = 0; i < noutput_items; i += nchan) {
+	for (unsigned int n = 0; n < nchan; n++) {
+	  memcpy (out, in[n], itemsize);
+	  out += itemsize;
+	  in[n] += itemsize;
+	}
+      }
+
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */