1 files changed, 85 insertions, 0 deletions
diff --git a/gr-fft/lib/goertzel_fc_impl.cc b/gr-fft/lib/goertzel_fc_impl.cc
new file mode 100644
index 000000000..ee214f24d
--- /dev/null
+++ b/gr-fft/lib/goertzel_fc_impl.cc
@@ -0,0 +1,85 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006,2010-2012 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "goertzel_fc_impl.h"
+#include <gr_io_signature.h>
+
+namespace gr {
+  namespace fft {
+    
+    goertzel_fc::sptr goertzel_fc::make(int rate, int len, float freq)
+    {
+      return gnuradio::get_initial_sptr(new goertzel_fc_impl(rate, len, freq));
+    }
+    
+    goertzel_fc_impl::goertzel_fc_impl(int rate, int len, float freq)
+      : gr_sync_decimator("goertzel_fc",
+			  gr_make_io_signature (1, 1, sizeof(float)),
+			  gr_make_io_signature (1, 1, sizeof(gr_complex)),
+			  len),
+	d_goertzel(rate, len, freq)
+    {
+      d_len = len;
+      d_rate = rate;
+      d_freq = freq;
+    }
+    
+    goertzel_fc_impl::~goertzel_fc_impl()
+    {
+    }
+
+    void
+    goertzel_fc_impl::set_freq(float freq)
+    {
+      d_freq = freq;
+      d_goertzel.set_params(d_rate, d_len, d_freq);
+    }
+
+    void
+    goertzel_fc_impl::set_rate(int rate)
+    {
+      d_rate = rate;
+      d_goertzel.set_params(d_rate, d_len, d_freq);
+    }
+    
+    int
+    goertzel_fc_impl::work(int noutput_items,
+			   gr_vector_const_void_star &input_items,
+			   gr_vector_void_star &output_items)
+    {
+      float *in = (float *)input_items[0];
+      gr_complex *out = (gr_complex *)output_items[0];
+      
+      for(int i = 0; i < noutput_items; i++) {
+	*out++ = d_goertzel.batch(in);
+	in += d_len;
+      }
+      
+      return noutput_items;
+    }
+
+  } /* namespace fft */
+} /* namespace gr */