1 files changed, 79 insertions, 0 deletions
diff --git a/gr-blocks/lib/lfsr_32k_source_s_impl.cc b/gr-blocks/lib/lfsr_32k_source_s_impl.cc
new file mode 100644
index 0000000000..738e732b49
--- /dev/null
+++ b/gr-blocks/lib/lfsr_32k_source_s_impl.cc
@@ -0,0 +1,79 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2010,2013 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 "lfsr_32k_source_s_impl.h"
+#include <gr_io_signature.h>
+#include <stdexcept>
+
+namespace gr {
+  namespace blocks {
+
+    lfsr_32k_source_s::sptr
+    lfsr_32k_source_s::make()
+    {
+      return gnuradio::get_initial_sptr
+        (new lfsr_32k_source_s_impl());
+    }
+
+    lfsr_32k_source_s_impl::lfsr_32k_source_s_impl()
+      : gr_sync_block("lfsr_32k_source_s",
+                      gr_make_io_signature(0, 0, 0),
+                      gr_make_io_signature(1, 1, sizeof(short))),
+        d_index(0)
+    {
+      lfsr_32k lfsr;
+
+      for(int i = 0; i < BUFSIZE; i++)
+        d_buffer[i] = lfsr.next_short();
+    }
+
+    lfsr_32k_source_s_impl::~lfsr_32k_source_s_impl()
+    {
+    }
+
+    int
+    lfsr_32k_source_s_impl::work(int noutput_items,
+                                 gr_vector_const_void_star &input_items,
+                                 gr_vector_void_star &output_items)
+    {
+      short *out = (short*)output_items[0];
+      short *buf = d_buffer;
+      int index = d_index;
+
+      for(int i = 0; i < noutput_items; i++) {
+        out[i] = buf[index];
+        // index = (index + 1) & (BUFSIZE - 1);
+        index = index + 1;
+        if(index >= BUFSIZE)
+          index = 0;
+      }
+
+      d_index = index;
+      return noutput_items;
+    }
+
+  } /* namespace blocks */
+} /* namespace gr */