diff options
author | Roman Khassraf <roman@khassraf.at> | 2015-08-05 12:30:29 +0200 |
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committer | Roman Khassraf <roman@khassraf.at> | 2015-08-05 12:30:29 +0200 |
commit | a1eb188b97d12737d58eed9162102798f440ba43 (patch) | |
tree | 2da6226b6f7f56d60b03a67917f8713d14823c17 /lib/flow_control | |
parent | 7cccb52ef3a1ab52167f59d10c74413d76ef1726 (diff) |
Implemented burst sub-slot splitter. Issue #100
Diffstat (limited to 'lib/flow_control')
-rw-r--r-- | lib/flow_control/burst_sdcch_subslot_splitter_impl.cc | 135 | ||||
-rw-r--r-- | lib/flow_control/burst_sdcch_subslot_splitter_impl.h | 54 |
2 files changed, 189 insertions, 0 deletions
diff --git a/lib/flow_control/burst_sdcch_subslot_splitter_impl.cc b/lib/flow_control/burst_sdcch_subslot_splitter_impl.cc new file mode 100644 index 0000000..260fe11 --- /dev/null +++ b/lib/flow_control/burst_sdcch_subslot_splitter_impl.cc @@ -0,0 +1,135 @@ +/* -*- 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_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) + { + 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 = d_subslots_sdcch8[fn_mod102]; + } + else if (d_mode == SPLITTER_SDCCH4) + { + subslot = d_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); + } + } /* namespace gsm */ +} /* namespace gr */ diff --git a/lib/flow_control/burst_sdcch_subslot_splitter_impl.h b/lib/flow_control/burst_sdcch_subslot_splitter_impl.h new file mode 100644 index 0000000..58aff96 --- /dev/null +++ b/lib/flow_control/burst_sdcch_subslot_splitter_impl.h @@ -0,0 +1,54 @@ +/* -*- 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. + * + */ + +#ifndef INCLUDED_GSM_BURST_SDCCH_SUBSLOT_SPLITTER_IMPL_H +#define INCLUDED_GSM_BURST_SDCCH_SUBSLOT_SPLITTER_IMPL_H + +#include <grgsm/flow_control/burst_sdcch_subslot_splitter.h> + +namespace gr { + namespace gsm { + + class burst_sdcch_subslot_splitter_impl : public burst_sdcch_subslot_splitter + { + private: + // hardcoded subslots of the channels, both SDCCH and the associated SACCH + // -1 means that the particular position in the frame is not SDCCH + const int8_t d_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 + }; + const int8_t d_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 + }; + splitter_mode d_mode; + public: + burst_sdcch_subslot_splitter_impl(splitter_mode mode); + ~burst_sdcch_subslot_splitter_impl(); + void process_burst(pmt::pmt_t msg); + }; + + } // namespace gsm +} // namespace gr + +#endif /* INCLUDED_GSM_BURST_SDCCH_SUBSLOT_SPLITTER_IMPL_H */ |