| /* -*- c++ -*- */ |
| /* |
| * @file |
| * @author (C) 2014 by Piotr Krysik <ptrkrysik@gmail.com> |
| * @section LICENSE |
| * |
| * Gr-gsm 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. |
| * |
| * Gr-gsm 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 gr-gsm; 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" |
| |
| namespace gr { |
| namespace gsm { |
| |
| controlled_rotator_cc::sptr |
| controlled_rotator_cc::make(double phase_inc) |
| { |
| return gnuradio::get_initial_sptr |
| (new controlled_rotator_cc_impl(phase_inc)); |
| } |
| |
| /* |
| * The private constructor |
| */ |
| controlled_rotator_cc_impl::controlled_rotator_cc_impl(double phase_inc) |
| : 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); |
| } |
| |
| /* |
| * 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) |
| { |
| //process phase_inc input |
| /*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 |
| |
| uint64_t 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++; |
| } |
| } |
| */ |
| |
| //get complex input and output |
| const gr_complex *in = (const gr_complex *)input_items[0]; |
| gr_complex *out = (gr_complex *)output_items[0]; |
| //get tags |
| |
| uint64_t processed_in = 0; |
| uint64_t produced_out = 0; |
| |
| std::vector<tag_t> set_phase_inc_tags; |
| |
| pmt::pmt_t key = pmt::string_to_symbol("set_phase_inc"); |
| get_tags_in_window(set_phase_inc_tags, 0, 0, noutput_items, key); |
| |
| for(std::vector<tag_t>::iterator i_tag = set_phase_inc_tags.begin(); i_tag < set_phase_inc_tags.end(); i_tag++){ |
| uint64_t tag_offset_rel = i_tag->offset-nitems_read(0); |
| set_phase_inc(pmt::to_double(i_tag->value)); |
| uint64_t samples_to_process = tag_offset_rel-processed_in; |
| d_r.rotateN((out+produced_out), const_cast<gr_complex *>(in+processed_in), samples_to_process); |
| processed_in = processed_in + samples_to_process; |
| produced_out = produced_out + samples_to_process; |
| // std::cout << "Rotator, phase inc: " << pmt::to_double(i_tag->value) << std::endl; |
| // |
| // float freq_offset_setting = (pmt::to_double(i_tag->value) / (2*M_PI)) * d_samp_rate; //send stream tag with a new value of the frequency offset |
| // 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,i_tag->offset, key, value); |
| } |
| |
| d_r.rotateN((out+produced_out), const_cast<gr_complex *>(in+processed_in), (noutput_items-produced_out)); //const_cast<gr_complex *> is workaround old implementation of rotateN that is still present in ubuntu 14.04 packages |
| return noutput_items; |
| } |
| } /* namespace gsm */ |
| } /* namespace gr */ |
| |