1 files changed, 78 insertions, 0 deletions
diff --git a/gr-analog/lib/pwr_squelch_cc_impl.h b/gr-analog/lib/pwr_squelch_cc_impl.h
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+++ b/gr-analog/lib/pwr_squelch_cc_impl.h
@@ -0,0 +1,78 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006,2012 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_ANALOG_PWR_SQUELCH_CC_IMPL_H
+#define INCLUDED_ANALOG_PWR_SQUELCH_CC_IMPL_H
+
+#include <analog/pwr_squelch_cc.h>
+#include "squelch_base_cc_impl.h"
+#include <filter/single_pole_iir.h>
+#include <cmath>
+
+namespace gr {
+  namespace analog {
+    
+    class ANALOG_API pwr_squelch_cc_impl :
+      public pwr_squelch_cc, squelch_base_cc_impl
+    {
+    private:
+      double d_threshold;
+      double d_pwr;
+      filter::single_pole_iir<double,double,double> d_iir;
+
+    protected:
+      virtual void update_state(const gr_complex &in);
+      virtual bool mute() const { return d_pwr < d_threshold; }
+
+    public:
+      pwr_squelch_cc_impl(double db, double alpha=0.0001,
+			  int ramp=0, bool gate=false);
+      ~pwr_squelch_cc_impl();
+
+      std::vector<float> squelch_range() const;
+
+      double threshold() const { return 10*log10(d_threshold); }
+      void set_threshold(double db) { d_threshold = std::pow(10.0, db/10); }
+      void set_alpha(double alpha) { d_iir.set_taps(alpha); }
+
+      int ramp() const { return squelch_base_cc_impl::ramp(); }
+      void set_ramp(int ramp) { squelch_base_cc_impl::set_ramp(ramp); }
+      bool gate() const { return squelch_base_cc_impl::gate(); }
+      void set_gate(bool gate) { squelch_base_cc_impl::set_gate(gate); }
+      bool unmuted() const { return squelch_base_cc_impl::unmuted(); }
+
+      int general_work(int noutput_items,
+		       gr_vector_int &ninput_items,
+		       gr_vector_const_void_star &input_items,
+		       gr_vector_void_star &output_items)
+      { 
+	return squelch_base_cc_impl::general_work(noutput_items,
+						  ninput_items,
+						  input_items,
+						  output_items);
+      }
+    };
+
+  } /* namespace analog */
+} /* namespace gr */
+
+#endif /* INCLUDED_ANALOG_PWR_SQUELCH_CC_IMPL_H */