GNU Radio 3.7.0 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2002,2004,2005,2013 Free Software Foundation, Inc. 00004 * 00005 * This file is part of GNU Radio 00006 * 00007 * GNU Radio is free software; you can redistribute it and/or modify 00008 * it under the terms of the GNU General Public License as published by 00009 * the Free Software Foundation; either version 3, or (at your option) 00010 * any later version. 00011 * 00012 * GNU Radio is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with GNU Radio; see the file COPYING. If not, write to 00019 * the Free Software Foundation, Inc., 51 Franklin Street, 00020 * Boston, MA 02110-1301, USA. 00021 */ 00022 00023 #ifndef INCLUDED_GR_FXPT_VCO_H 00024 #define INCLUDED_GR_FXPT_VCO_H 00025 00026 #include <gnuradio/api.h> 00027 #include <gnuradio/fxpt.h> 00028 #include <gnuradio/gr_complex.h> 00029 00030 namespace gr { 00031 00032 /*! 00033 * \brief Voltage Controlled Oscillator (VCO) 00034 * \ingroup misc 00035 */ 00036 class /*GR_RUNTIME_API*/ fxpt_vco { 00037 gr_int32 d_phase; 00038 00039 public: 00040 fxpt_vco () : d_phase(0) {} 00041 00042 ~fxpt_vco() {} 00043 00044 // radians 00045 void set_phase(float angle) { 00046 d_phase = fxpt::float_to_fixed(angle); 00047 } 00048 00049 void adjust_phase(float delta_phase) { 00050 d_phase += fxpt::float_to_fixed(delta_phase); 00051 } 00052 00053 float get_phase() const { 00054 return fxpt::fixed_to_float(d_phase); 00055 } 00056 00057 // compute sin and cos for current phase angle 00058 void sincos(float *sinx, float *cosx) const 00059 { 00060 *sinx = fxpt::sin(d_phase); 00061 *cosx = fxpt::cos(d_phase); 00062 } 00063 00064 // compute a block at a time 00065 void cos(float *output, const float *input, int noutput_items, float k, float ampl = 1.0) 00066 { 00067 for(int i = 0; i < noutput_items; i++) { 00068 output[i] = (float)(fxpt::cos(d_phase) * ampl); 00069 adjust_phase(input[i] * k); 00070 } 00071 } 00072 00073 // compute cos or sin for current phase angle 00074 float cos() const { return fxpt::cos(d_phase); } 00075 float sin() const { return fxpt::sin(d_phase); } 00076 }; 00077 00078 } /* namespace gr */ 00079 00080 #endif /* INCLUDED_GR_FXPT_VCO_H */