2 files changed, 63 insertions, 0 deletions
diff --git a/gr-analog/include/analog/CMakeLists.txt b/gr-analog/include/analog/CMakeLists.txt
index 99839449b..0d2944c3b 100644
--- a/gr-analog/include/analog/CMakeLists.txt
+++ b/gr-analog/include/analog/CMakeLists.txt
@@ -100,6 +100,7 @@ install(FILES
     probe_avg_mag_sqrd_f.h
     rotator.h
     sig_source_waveform.h
+    simple_squelch_cc.h
     DESTINATION ${GR_INCLUDE_DIR}/gnuradio/analog
     COMPONENT "analog_devel"
 )
diff --git a/gr-analog/include/analog/simple_squelch_cc.h b/gr-analog/include/analog/simple_squelch_cc.h
new file mode 100644
index 000000000..1e12646e4
--- /dev/null
+++ b/gr-analog/include/analog/simple_squelch_cc.h
@@ -0,0 +1,62 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2012 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_SIMPLE_SQUELCH_CC_H
+#define INCLUDED_ANALOG_SIMPLE_SQUELCH_CC_H
+
+#include <analog/api.h>
+#include <gr_sync_block.h>
+
+namespace gr {
+  namespace analog {
+    
+    /*!
+     * \brief simple squelch block based on average signal power and threshold in dB.
+     * \ingroup level_blk
+     */
+    class ANALOG_API simple_squelch_cc : virtual public gr_sync_block
+    {
+    public:
+      // gr::analog::simple_squelch_cc::sptr
+      typedef boost::shared_ptr<simple_squelch_cc> sptr;
+
+      /*!
+       * \brief Make a simple squelch block.
+       *
+       * \param threshold_db Threshold for muting.
+       * \param alpha Gain parameter for the running average filter.
+       */
+      static sptr make(double threshold_db, double alpha);
+
+      virtual bool unmuted() const  = 0;
+
+      virtual void set_alpha(double alpha) = 0;
+      virtual void set_threshold(double decibels) = 0;
+
+      virtual double threshold() const = 0;
+      virtual std::vector<float> squelch_range() const = 0;
+    };
+
+  } /* namespace analog */
+} /* namespace gr */
+
+#endif /* INCLUDED_ANALOG_SIMPLE_SQUELCH_CC_H */