diff options
| author | Tom Rondeau <trondeau@vt.edu> | 2013-04-17 13:43:52 -0400 |
|---|---|---|
| committer | Tom Rondeau <trondeau@vt.edu> | 2013-04-29 14:52:56 -0400 |
| commit | f3e2e07201c50033bf6c9d0c6a6f068557b4f17f (patch) | |
| tree | 140b3c2d20a951ffd4abd564c3378ee2e2f9fc7c /gnuradio-runtime/lib/math/vco.h | |
| parent | 35303ae975a5b1bdecc2492bc96e2b8e89b62a3d (diff) | |
runtime: converting runtime core to gr namespace, gnuradio include dir.
Diffstat (limited to 'gnuradio-runtime/lib/math/vco.h')
| -rw-r--r-- | gnuradio-runtime/lib/math/vco.h | 99 |
1 files changed, 99 insertions, 0 deletions
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_ */ |