107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2014 <+YOU OR YOUR COMPANY+>.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gnuradio/io_signature.h>
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#include "controlled_rotator_cc_impl.h"
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#include <math.h>
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namespace gr {
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namespace gsm {
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controlled_rotator_cc::sptr
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controlled_rotator_cc::make(double phase_inc, double samp_rate)
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{
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return gnuradio::get_initial_sptr
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(new controlled_rotator_cc_impl(phase_inc, samp_rate));
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}
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/*
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* The private constructor
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*/
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controlled_rotator_cc_impl::controlled_rotator_cc_impl(double phase_inc, double samp_rate)
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: gr::sync_block("controlled_rotator_cc",
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gr::io_signature::make2(1, 2, sizeof(gr_complex), sizeof(float)),
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gr::io_signature::make(1, 1, sizeof(gr_complex)))
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{
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set_phase_inc(phase_inc);
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set_samp_rate(samp_rate);
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}
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/*
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* Our virtual destructor.
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*/
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controlled_rotator_cc_impl::~controlled_rotator_cc_impl()
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{
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}
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void
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controlled_rotator_cc_impl::set_phase_inc(double phase_inc)
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{
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d_phase_inc = phase_inc;
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d_r.set_phase_incr( exp(gr_complex(0, (double)phase_inc)) );
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}
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void
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controlled_rotator_cc_impl::set_samp_rate(double samp_rate)
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{
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d_samp_rate = samp_rate;
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}
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int
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controlled_rotator_cc_impl::work(int noutput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items)
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{
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const gr_complex *in = (const gr_complex *)input_items[0];
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gr_complex *out = (gr_complex *)output_items[0];
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if(input_items.size() == 2) {
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int ii=0;
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const float *pp = (const float *)input_items[1];
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while(ii < noutput_items){
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//look for different values on phase increment control input
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if(d_phase_inc != (*pp)){
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set_phase_inc(*(pp)); //set new value of phase increment
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float freq_offset_setting = (*(pp) / (2*M_PI)) * d_samp_rate; //send stream tag with a new value of the frequency offset
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int offset = nitems_written(0);
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pmt::pmt_t key = pmt::string_to_symbol("setting_freq_offset");
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pmt::pmt_t value = pmt::from_double(freq_offset_setting);
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add_item_tag(0,offset, key, value);
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break;
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}
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pp++;
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ii++;
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}
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}
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d_r.rotateN(out, in, noutput_items);
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return noutput_items;
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}
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} /* namespace gsm */
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} /* namespace gr */
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