GNU Radio 3.4.0 C++ API
|
00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2002,2004,2005 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 #ifndef INCLUDED_GR_FXPT_VCO_H 00023 #define INCLUDED_GR_FXPT_VCO_H 00024 00025 #include <gr_fxpt.h> 00026 #include <gr_complex.h> 00027 00028 /*! 00029 * \brief Voltage Controlled Oscillator (VCO) 00030 * \ingroup misc 00031 */ 00032 class gr_fxpt_vco { 00033 gr_int32 d_phase; 00034 00035 public: 00036 gr_fxpt_vco () : d_phase (0) {} 00037 00038 ~gr_fxpt_vco () {} 00039 00040 // radians 00041 void set_phase (float angle) { 00042 d_phase = gr_fxpt::float_to_fixed (angle); 00043 } 00044 00045 void adjust_phase (float delta_phase) { 00046 d_phase += gr_fxpt::float_to_fixed (delta_phase); 00047 } 00048 00049 float get_phase () const { return gr_fxpt::fixed_to_float (d_phase); } 00050 00051 // compute sin and cos for current phase angle 00052 void sincos (float *sinx, float *cosx) const 00053 { 00054 *sinx = gr_fxpt::sin (d_phase); 00055 *cosx = gr_fxpt::cos (d_phase); 00056 } 00057 00058 // compute a block at a time 00059 void cos (float *output, const float *input, int noutput_items, float k, float ampl = 1.0) 00060 { 00061 for (int i = 0; i < noutput_items; i++){ 00062 output[i] = (float)(gr_fxpt::cos (d_phase) * ampl); 00063 adjust_phase(input[i] * k); 00064 } 00065 } 00066 00067 // compute cos or sin for current phase angle 00068 float cos () const { return gr_fxpt::cos (d_phase); } 00069 float sin () const { return gr_fxpt::sin (d_phase); } 00070 }; 00071 00072 #endif /* INCLUDED_GR_FXPT_VCO_H */