| /* -*- c++ -*- */ |
| /* |
| * Copyright 2014 <+YOU OR YOUR COMPANY+>. |
| * |
| * This 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. |
| * |
| * This software 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 this software; see the file COPYING. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <gnuradio/io_signature.h> |
| #include "controlled_rotator_cc_impl.h" |
| #include <gnuradio/blocks/rotator_cc.h> |
| #include <math.h> |
| |
| namespace gr { |
| namespace gsm { |
| |
| controlled_rotator_cc::sptr |
| controlled_rotator_cc::make(double phase_inc, double samp_rate) |
| { |
| return gnuradio::get_initial_sptr |
| (new controlled_rotator_cc_impl(phase_inc, samp_rate)); |
| } |
| |
| /* |
| * The private constructor |
| */ |
| controlled_rotator_cc_impl::controlled_rotator_cc_impl(double phase_inc, double samp_rate) |
| : gr::sync_block("controlled_rotator_cc", |
| gr::io_signature::make2(1, 2, sizeof(gr_complex), sizeof(float)), |
| gr::io_signature::make(1, 1, sizeof(gr_complex))) |
| { |
| set_phase_inc(phase_inc); |
| set_samp_rate(samp_rate); |
| } |
| |
| /* |
| * Our virtual destructor. |
| */ |
| controlled_rotator_cc_impl::~controlled_rotator_cc_impl() |
| { |
| } |
| |
| void |
| controlled_rotator_cc_impl::set_phase_inc(double phase_inc) |
| { |
| d_phase_inc = phase_inc; |
| d_r.set_phase_incr( exp(gr_complex(0, (double)phase_inc)) ); |
| } |
| |
| void |
| controlled_rotator_cc_impl::set_samp_rate(double samp_rate) |
| { |
| d_samp_rate = samp_rate; |
| } |
| |
| int |
| controlled_rotator_cc_impl::work(int noutput_items, |
| gr_vector_const_void_star &input_items, |
| gr_vector_void_star &output_items) |
| { |
| const gr_complex *in = (const gr_complex *)input_items[0]; |
| gr_complex *out = (gr_complex *)output_items[0]; |
| |
| if(input_items.size() == 2) { |
| int ii=0; |
| const float *pp = (const float *)input_items[1]; |
| |
| while(ii < noutput_items){ |
| //look for different values on phase increment control input |
| if(d_phase_inc != (*pp)){ |
| set_phase_inc(*(pp)); //set new value of phase increment |
| |
| float freq_offset_setting = (*(pp) / (2*M_PI)) * d_samp_rate; //send stream tag with a new value of the frequency offset |
| int offset = nitems_written(0); |
| pmt::pmt_t key = pmt::string_to_symbol("setting_freq_offset"); |
| pmt::pmt_t value = pmt::from_double(freq_offset_setting); |
| add_item_tag(0,offset, key, value); |
| |
| break; |
| } |
| pp++; |
| ii++; |
| } |
| } |
| d_r.rotateN(out, in, noutput_items); |
| return noutput_items; |
| } |
| |
| } /* namespace gsm */ |
| } /* namespace gr */ |
| |