| /* -*- c++ -*- */ |
| /* @file |
| * @author Roman Khassraf <rkhassraf@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 "burst_fnr_filter_impl.h" |
| #include <stdio.h> |
| #include <grgsm/endian.h> |
| #include <grgsm/gsmtap.h> |
| |
| |
| namespace gr { |
| namespace gsm { |
| |
| burst_fnr_filter::sptr |
| burst_fnr_filter::make(filter_mode mode, unsigned int fnr) |
| { |
| return gnuradio::get_initial_sptr |
| (new burst_fnr_filter_impl(mode, fnr)); |
| } |
| |
| /* |
| * The private constructor |
| */ |
| burst_fnr_filter_impl::burst_fnr_filter_impl(filter_mode mode, unsigned int fnr) |
| : gr::block("burst_fnr_filter", |
| gr::io_signature::make(0, 0, 0), |
| gr::io_signature::make(0, 0, 0)), |
| d_mode(mode), |
| d_framenr(fnr) |
| { |
| message_port_register_in(pmt::mp("in")); |
| message_port_register_out(pmt::mp("out")); |
| |
| set_msg_handler(pmt::mp("in"), boost::bind(&burst_fnr_filter_impl::process_burst, this, _1)); |
| } |
| |
| /* |
| * Our virtual destructor. |
| */ |
| burst_fnr_filter_impl::~burst_fnr_filter_impl() {} |
| |
| void burst_fnr_filter_impl::process_burst(pmt::pmt_t msg) |
| { |
| pmt::pmt_t header_plus_burst = pmt::cdr(msg); |
| gsmtap_hdr * header = (gsmtap_hdr *)pmt::blob_data(header_plus_burst); |
| |
| unsigned int frame_nr = be32toh(header->frame_number); |
| |
| if ((d_mode == FILTER_LESS_OR_EQUAL && frame_nr <= d_framenr) |
| || d_mode == FILTER_GREATER_OR_EQUAL && frame_nr >= d_framenr) |
| { |
| message_port_pub(pmt::mp("out"), msg); |
| } |
| } |
| } /* namespace gsm */ |
| } /* namespace gr */ |