From f3e2e07201c50033bf6c9d0c6a6f068557b4f17f Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Wed, 17 Apr 2013 13:43:52 -0400
Subject: runtime: converting runtime core to gr namespace, gnuradio include
dir.
---
gnuradio-runtime/lib/math/vco.h | 99 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 99 insertions(+)
create mode 100644 gnuradio-runtime/lib/math/vco.h
(limited to 'gnuradio-runtime/lib/math/vco.h')
diff --git a/gnuradio-runtime/lib/math/vco.h b/gnuradio-runtime/lib/math/vco.h
new file mode 100644
index 0000000000..fa11732c1f
--- /dev/null
+++ b/gnuradio-runtime/lib/math/vco.h
@@ -0,0 +1,99 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2013 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 _GR_VCO_H_
+#define _GR_VCO_H_
+
+#include <gnuradio/sincos.h>
+#include <gnuradio/gr_complex.h>
+#include <vector>
+#include <cmath>
+
+namespace gr {
+
+ /*!
+ * \brief base class template for Voltage Controlled Oscillator (VCO)
+ * \ingroup misc
+ */
+ template<class o_type, class i_type>
+ class vco
+ {
+ public:
+ vco() : d_phase(0) {}
+
+ virtual ~vco() {}
+
+ // radians
+ void set_phase(double angle) {
+ d_phase = angle;
+ }
+
+ void adjust_phase(double delta_phase) {
+ d_phase += delta_phase;
+ if(fabs (d_phase) > M_PI){
+
+ while(d_phase > M_PI)
+ d_phase -= 2*M_PI;
+
+ while(d_phase < -M_PI)
+ d_phase += 2*M_PI;
+ }
+ }
+
+ double get_phase() const { return d_phase; }
+
+ // compute sin and cos for current phase angle
+ void sincos(float *sinx, float *cosx) const;
+
+ // compute cos or sin for current phase angle
+ float cos() const { return std::cos(d_phase); }
+ float sin() const { return std::sin(d_phase); }
+
+ // compute a block at a time
+ void cos(float *output, const float *input,
+ int noutput_items, double k, double ampl = 1.0);
+
+ protected:
+ double d_phase;
+ };
+
+ template<class o_type, class i_type>
+ void
+ vco<o_type,i_type>::sincos(float *sinx, float *cosx) const
+ {
+ gr::sincosf(d_phase, sinx, cosx);
+ }
+
+ template<class o_type, class i_type>
+ void
+ vco<o_type,i_type>::cos(float *output, const float *input,
+ int noutput_items, double k, double ampl)
+ {
+ for(int i = 0; i < noutput_items; i++) {
+ output[i] = cos() * ampl;
+ adjust_phase(input[i] * k);
+ }
+ }
+
+} /* namespace gr */
+
+#endif /* _GR_VCO_H_ */
--
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