README change

1 files changed, 57 insertions, 0 deletions

diff --git a/gr-blocks/lib/threshold_ff_impl.h b/gr-blocks/lib/threshold_ff_impl.h
new file mode 100644
index 000000000..41afaa52a
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+++ b/gr-blocks/lib/threshold_ff_impl.h
@@ -0,0 +1,57 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2013 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.
+ */
+
+#ifndef INCLUDED_GR_THRESHOLD_FF_IMPL_H
+#define INCLUDED_GR_THRESHOLD_FF_IMPL_H
+
+#include <blocks/threshold_ff.h>
+
+namespace gr {
+  namespace blocks {
+
+    class threshold_ff_impl : public threshold_ff
+    {
+    private:
+      float d_lo, d_hi;    // the constant
+      float d_last_state;
+
+    public:
+      threshold_ff_impl(float lo, float hi,
+                        float initial_state=0);
+      ~threshold_ff_impl();
+
+      float lo() const { return d_lo; }
+      void set_lo(float lo) { d_lo = lo; }
+      float hi() const { return d_hi; }
+      void set_hi(float hi) { d_hi = hi; }
+      float last_state() const { return d_last_state; }
+      void set_last_state(float last_state) { d_last_state = last_state; }
+
+      int work(int noutput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_THRESHOLD_FF_IMPL_H */