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Diffstat (limited to 'gr-blocks/include/blocks/nco.h')
| -rw-r--r-- | gr-blocks/include/blocks/nco.h | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/gr-blocks/include/blocks/nco.h b/gr-blocks/include/blocks/nco.h deleted file mode 100644 index e6658a3572..0000000000 --- a/gr-blocks/include/blocks/nco.h +++ /dev/null @@ -1,210 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2002,2013 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_NCO_H_ -#define _GR_NCO_H_ - -#include <vector> -#include <gr_sincos.h> -#include <cmath> -#include <gr_complex.h> - -namespace gr { - namespace blocks { - - /*! - * \brief base class template for Numerically Controlled Oscillator (NCO) - * \ingroup misc - * - * Calculate sine and cosine based on the current phase. This - * class has multiple ways to calculate sin/cos and when - * requensting a range will increment the phase based on a - * frequency, which can be set using set_freq. Similar interfaces - * to the fxpt_vco can also be used to set or adjust the current - * phase. - * - * \sa fxpt_nco.h for fixed-point implementation. - */ - template<class o_type, class i_type> - class nco - { - public: - nco() : phase(0), phase_inc(0) {} - - virtual ~nco() {} - - //! Set the current phase \p angle in radians - void set_phase(double angle) { - phase = angle; - } - - //! Update the current phase in radians by \p delta_phase - void adjust_phase(double delta_phase) { - phase += delta_phase; - } - - //! angle_rate is in radians / step - void set_freq(double angle_rate) { - phase_inc = angle_rate; - } - - //! angle_rate is a delta in radians / step - void adjust_freq(double delta_angle_rate) { - phase_inc += delta_angle_rate; - } - - //! increment current phase angle - void step() - { - phase += phase_inc; - if(fabs (phase) > M_PI) { - - while(phase > M_PI) - phase -= 2*M_PI; - - while(phase < -M_PI) - phase += 2*M_PI; - } - } - - //! increment current phase angle n times - void step(int n) - { - phase += phase_inc * n; - if(fabs (phase) > M_PI) { - - while(phase > M_PI) - phase -= 2*M_PI; - - while(phase < -M_PI) - phase += 2*M_PI; - } - } - - //! units are radians / step - double get_phase() const { return phase; } - double get_freq() const { return phase_inc; } - - //! 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 (phase); } - float sin() const { return std::sin (phase); } - - //! compute a block at a time - void sin(float *output, int noutput_items, double ampl = 1.0); - void cos(float *output, int noutput_items, double ampl = 1.0); - void sincos(gr_complex *output, int noutput_items, double ampl = 1.0); - void sin(short *output, int noutput_items, double ampl = 1.0); - void cos(short *output, int noutput_items, double ampl = 1.0); - void sin(int *output, int noutput_items, double ampl = 1.0); - void cos(int *output, int noutput_items, double ampl = 1.0); - - protected: - double phase; - double phase_inc; - }; - - template<class o_type, class i_type> - void - nco<o_type,i_type>::sincos(float *sinx, float *cosx) const - { - gr_sincosf(phase, sinx, cosx); - } - - template<class o_type, class i_type> - void - nco<o_type,i_type>::sin(float *output, int noutput_items, double ampl) - { - for(int i = 0; i < noutput_items; i++) { - output[i] = (float)(sin() * ampl); - step(); - } - } - - template<class o_type, class i_type> - void - nco<o_type,i_type>::cos(float *output, int noutput_items, double ampl) - { - for(int i = 0; i < noutput_items; i++){ - output[i] = (float)(cos() * ampl); - step(); - } - } - - template<class o_type, class i_type> - void - nco<o_type,i_type>::sin(short *output, int noutput_items, double ampl) - { - for(int i = 0; i < noutput_items; i++) { - output[i] = (short)(sin() * ampl); - step(); - } - } - - template<class o_type, class i_type> - void - nco<o_type,i_type>::cos(short *output, int noutput_items, double ampl) - { - for(int i = 0; i < noutput_items; i++) { - output[i] = (short)(cos() * ampl); - step(); - } - } - - template<class o_type, class i_type> - void - nco<o_type,i_type>::sin(int *output, int noutput_items, double ampl) - { - for(int i = 0; i < noutput_items; i++) { - output[i] = (int)(sin() * ampl); - step(); - } - } - - template<class o_type, class i_type> - void - nco<o_type,i_type>::cos(int *output, int noutput_items, double ampl) - { - for(int i = 0; i < noutput_items; i++) { - output[i] = (int)(cos() * ampl); - step(); - } - } - - template<class o_type, class i_type> - void - nco<o_type,i_type>::sincos(gr_complex *output, int noutput_items, double ampl) - { - for(int i = 0; i < noutput_items; i++) { - float cosx, sinx; - sincos(&sinx, &cosx); - output[i] = gr_complex(cosx * ampl, sinx * ampl); - step(); - } - } - - } /* namespace blocks */ -} /* namespace gr */ - -#endif /* _NCO_H_ */ |