| /* -*- c++ -*- */ |
| /* @file |
| * @author (C) 2015 by 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_sdcch_subslot_splitter_impl.h" |
| #include <stdio.h> |
| #include <grgsm/endian.h> |
| #include <grgsm/gsmtap.h> |
| |
| namespace gr { |
| namespace gsm { |
| |
| burst_sdcch_subslot_splitter::sptr |
| burst_sdcch_subslot_splitter::make(splitter_mode mode) |
| { |
| return gnuradio::get_initial_sptr |
| (new burst_sdcch_subslot_splitter_impl(mode)); |
| } |
| |
| /* |
| * The private constructor |
| */ |
| burst_sdcch_subslot_splitter_impl::burst_sdcch_subslot_splitter_impl(splitter_mode mode) |
| : gr::block("burst_sdcch_subslot_splitter", |
| gr::io_signature::make(0, 0, 0), |
| gr::io_signature::make(0, 0, 0)), |
| d_mode(mode) |
| { |
| message_port_register_in(pmt::mp("in")); |
| |
| message_port_register_out(pmt::mp("out0")); |
| message_port_register_out(pmt::mp("out1")); |
| message_port_register_out(pmt::mp("out2")); |
| message_port_register_out(pmt::mp("out3")); |
| if (d_mode == SPLITTER_SDCCH8) |
| { |
| message_port_register_out(pmt::mp("out4")); |
| message_port_register_out(pmt::mp("out5")); |
| message_port_register_out(pmt::mp("out6")); |
| message_port_register_out(pmt::mp("out7")); |
| } |
| |
| set_msg_handler(pmt::mp("in"), boost::bind(&burst_sdcch_subslot_splitter_impl::process_burst, this, _1)); |
| } |
| |
| /* |
| * Our virtual destructor. |
| */ |
| burst_sdcch_subslot_splitter_impl::~burst_sdcch_subslot_splitter_impl() {} |
| |
| void burst_sdcch_subslot_splitter_impl::process_burst(pmt::pmt_t msg) |
| { |
| // hardcoded subslots of the channels, both SDCCH and the associated SACCH |
| // -1 means that the particular position in the frame is not SDCCH |
| static const int8_t subslots_sdcch4[102] = { |
| -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, 0, 0, 0, 0, 1, 1, 1, 1,-1,-1, 2, 2, 2, 2, 3, 3, 3, 3,-1,-1, 0, 0, 0, 0, 1, 1, 1, 1,-1, |
| -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, 0, 0, 0, 0, 1, 1, 1, 1,-1,-1, 2, 2, 2, 2, 3, 3, 3, 3,-1,-1, 2, 2, 2, 2, 3, 3, 3, 3,-1 |
| }; |
| static const int8_t subslots_sdcch8[102] = { |
| 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,-1,-1,-1, |
| 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7,-1,-1,-1 |
| }; |
| |
| pmt::pmt_t header_plus_burst = pmt::cdr(msg); |
| gsmtap_hdr * header = (gsmtap_hdr *)pmt::blob_data(header_plus_burst); |
| |
| uint32_t frame_nr = be32toh(header->frame_number); |
| uint32_t fn_mod102 = frame_nr % 102; |
| |
| int8_t subslot; |
| |
| if (d_mode == SPLITTER_SDCCH8) |
| { |
| subslot = subslots_sdcch8[fn_mod102]; |
| } |
| else if (d_mode == SPLITTER_SDCCH4) |
| { |
| subslot = subslots_sdcch4[fn_mod102]; |
| } |
| |
| if ((subslot == -1) || (d_mode == SPLITTER_SDCCH4 && subslot > 3)) |
| { |
| return; |
| } |
| |
| std::string port("out"); |
| |
| switch (subslot) |
| { |
| case 0: |
| port.append("0"); |
| break; |
| case 1: |
| port.append("1"); |
| break; |
| case 2: |
| port.append("2"); |
| break; |
| case 3: |
| port.append("3"); |
| break; |
| case 4: |
| port.append("4"); |
| break; |
| case 5: |
| port.append("5"); |
| break; |
| case 6: |
| port.append("6"); |
| break; |
| case 7: |
| port.append("7"); |
| break; |
| default: |
| port.append("0"); |
| break; |
| } |
| |
| message_port_pub(pmt::mp(port), msg); |
| } |
| |
| /* External API */ |
| splitter_mode |
| burst_sdcch_subslot_splitter_impl::get_mode(void) |
| { |
| return d_mode; |
| } |
| |
| splitter_mode |
| burst_sdcch_subslot_splitter_impl::set_mode(splitter_mode mode) |
| { |
| d_mode = mode; |
| return d_mode; |
| } |
| |
| } /* namespace gsm */ |
| } /* namespace gr */ |