1 files changed, 82 insertions, 0 deletions
diff --git a/gr-analog/lib/ctcss_squelch_ff_impl.h b/gr-analog/lib/ctcss_squelch_ff_impl.h
new file mode 100644
index 000000000..0827fbafe
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+++ b/gr-analog/lib/ctcss_squelch_ff_impl.h
@@ -0,0 +1,82 @@
+/* -*- 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_CTCSS_SQUELCH_FF_IMPL_H
+#define INCLUDED_ANALOG_CTCSS_SQUELCH_FF_IMPL_H
+
+#include <analog/ctcss_squelch_ff.h>
+#include "squelch_base_ff_impl.h"
+#include <fft/goertzel.h>
+
+namespace gr {
+  namespace analog {
+
+    class ctcss_squelch_ff_impl : public ctcss_squelch_ff, squelch_base_ff_impl
+    {
+    private:
+      float d_freq;
+      float d_level;
+      int   d_len;
+      bool  d_mute;
+
+      fft::goertzel d_goertzel_l;
+      fft::goertzel d_goertzel_c;
+      fft::goertzel d_goertzel_r;
+
+      int find_tone(float freq);
+
+    protected:
+      virtual void update_state(const float &in);
+      virtual bool mute() const { return d_mute; }
+
+    public:
+      ctcss_squelch_ff_impl(int rate, float freq, float level,
+			    int len, int ramp, bool gate);
+      ~ctcss_squelch_ff_impl();
+
+      std::vector<float> squelch_range() const;
+      float level() const { return d_level; }
+      void set_level(float level) { d_level = level; }
+      int len() const { return d_len; }
+
+      int ramp() const { return squelch_base_ff_impl::ramp(); }
+      void set_ramp(int ramp) { squelch_base_ff_impl::set_ramp(ramp); }
+      bool gate() const { return squelch_base_ff_impl::gate(); }
+      void set_gate(bool gate) { squelch_base_ff_impl::set_gate(gate); }
+      bool unmuted() const { return squelch_base_ff_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_ff_impl::general_work(noutput_items,
+						  ninput_items,
+						  input_items,
+						  output_items);
+      }
+    };
+
+  } /* namespace analog */
+} /* namespace gr */
+
+#endif /* INCLUDED_ANALOG_CTCSS_SQUELCH_FF_IMPL_H */