1 files changed, 86 insertions, 0 deletions
diff --git a/gr-analog/lib/cpfsk_bc_impl.cc b/gr-analog/lib/cpfsk_bc_impl.cc
new file mode 100644
index 000000000..1b7f25f6c
--- /dev/null
+++ b/gr-analog/lib/cpfsk_bc_impl.cc
@@ -0,0 +1,86 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008,2010,2012 Free Software Foundation, Inc.
+ *
+ * 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 "cpfsk_bc_impl.h"
+#include <gr_io_signature.h>
+#include <gr_expj.h>
+
+namespace gr {
+  namespace analog {
+    
+#define M_TWOPI (2*M_PI)
+
+    cpfsk_bc::sptr
+    cpfsk_bc::make(float k, float ampl, int samples_per_sym)
+    {
+      return gnuradio::get_initial_sptr
+	(new cpfsk_bc_impl(k, ampl, samples_per_sym));
+    }
+
+    cpfsk_bc_impl::cpfsk_bc_impl(float k, float ampl, int samples_per_sym)
+      : gr_sync_interpolator("cpfsk_bc",
+			     gr_make_io_signature(1, 1, sizeof(char)),
+			     gr_make_io_signature(1, 1, sizeof(gr_complex)),
+			     samples_per_sym)
+    {
+      d_samples_per_sym = samples_per_sym;
+      d_freq = k*M_PI/samples_per_sym;
+      d_ampl = ampl;
+      d_phase = 0.0;
+    }
+
+    cpfsk_bc_impl::~cpfsk_bc_impl()
+    {
+    }
+
+    int
+    cpfsk_bc_impl::work(int noutput_items,
+			gr_vector_const_void_star &input_items,
+			gr_vector_void_star &output_items)
+    {
+      const char *in = (const char*)input_items[0];
+      gr_complex *out = (gr_complex*)output_items[0];
+
+      for(int i = 0; i < noutput_items/d_samples_per_sym; i++) {
+	for(int j = 0; j < d_samples_per_sym; j++) {
+	  if(in[i] == 1)
+	    d_phase += d_freq;
+	  else
+	    d_phase -= d_freq;
+
+	  while(d_phase > M_TWOPI)
+	    d_phase -= M_TWOPI;
+	  while(d_phase < -M_TWOPI)
+	    d_phase += M_TWOPI;
+
+	  *out++ = gr_expj(d_phase)*d_ampl;
+	}
+      }
+
+      return noutput_items;
+    }
+
+  } /* namespace analog */
+} /* namespace gr */
+