diff options
author | Roman Khassraf <roman@khassraf.at> | 2015-08-06 17:30:04 +0200 |
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committer | Roman Khassraf <roman@khassraf.at> | 2015-08-06 17:30:04 +0200 |
commit | 8b64d873caa958ec102fac20dd95978fb81e703f (patch) | |
tree | 76e5a1b2cf5907741bfd426c10c401e9bb05c1d1 /lib | |
parent | d7e3eec3ae95bd172f13ad44d9ebdb3627da42ae (diff) |
Implemented burst sdcch subslot filter. Issue #100
Diffstat (limited to 'lib')
-rw-r--r-- | lib/CMakeLists.txt | 1 | ||||
-rw-r--r-- | lib/flow_control/burst_sdcch_subslot_filter_impl.cc | 95 | ||||
-rw-r--r-- | lib/flow_control/burst_sdcch_subslot_filter_impl.h | 55 |
3 files changed, 151 insertions, 0 deletions
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt index 0d61b7d..a842823 100644 --- a/lib/CMakeLists.txt +++ b/lib/CMakeLists.txt @@ -49,6 +49,7 @@ list(APPEND grgsm_sources flow_control/burst_timeslot_splitter_impl.cc flow_control/burst_sdcch_subslot_splitter_impl.cc flow_control/burst_timeslot_filter_impl.cc + flow_control/burst_sdcch_subslot_filter_impl.cc flow_control/burst_fnr_filter_impl.cc flow_control/dummy_burst_filter_impl.cc misc_utils/controlled_rotator_cc_impl.cc diff --git a/lib/flow_control/burst_sdcch_subslot_filter_impl.cc b/lib/flow_control/burst_sdcch_subslot_filter_impl.cc new file mode 100644 index 0000000..9f27fcd --- /dev/null +++ b/lib/flow_control/burst_sdcch_subslot_filter_impl.cc @@ -0,0 +1,95 @@ +/* -*- 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_filter_impl.h" +#include <stdio.h> +#include <grgsm/endian.h> +#include <grgsm/gsmtap.h> + + +namespace gr { + namespace gsm { + + burst_sdcch_subslot_filter::sptr + burst_sdcch_subslot_filter::make(subslot_filter_mode mode, unsigned int subslot) + { + return gnuradio::get_initial_sptr + (new burst_sdcch_subslot_filter_impl(mode, subslot)); + } + + /* + * The private constructor + */ + burst_sdcch_subslot_filter_impl::burst_sdcch_subslot_filter_impl(subslot_filter_mode mode, unsigned int subslot) + : gr::block("burst_sdcch_subslot_filter", + gr::io_signature::make(0, 0, 0), + gr::io_signature::make(0, 0, 0)), + d_mode(mode), + d_subslot(subslot) + { + message_port_register_in(pmt::mp("in")); + message_port_register_out(pmt::mp("out")); + + set_msg_handler(pmt::mp("in"), boost::bind(&burst_sdcch_subslot_filter_impl::process_burst, this, _1)); + } + + /* + * Our virtual destructor. + */ + burst_sdcch_subslot_filter_impl::~burst_sdcch_subslot_filter_impl() {} + + void burst_sdcch_subslot_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); + + uint32_t frame_nr = be32toh(header->frame_number); + uint32_t fn_mod102 = frame_nr % 102; + + int8_t subslot; + + if (d_mode == SS_FILTER_SDCCH8) + { + subslot = d_subslots_sdcch8[fn_mod102]; + } + else if (d_mode == SS_FILTER_SDCCH4) + { + subslot = d_subslots_sdcch4[fn_mod102]; + } + + if ((subslot == -1) || (d_mode == SS_FILTER_SDCCH4 && subslot > 3)) + { + return; + } + + if (subslot == d_subslot) + { + message_port_pub(pmt::mp("out"), msg); + } + } + } /* namespace gsm */ +} /* namespace gr */ diff --git a/lib/flow_control/burst_sdcch_subslot_filter_impl.h b/lib/flow_control/burst_sdcch_subslot_filter_impl.h new file mode 100644 index 0000000..05038d7 --- /dev/null +++ b/lib/flow_control/burst_sdcch_subslot_filter_impl.h @@ -0,0 +1,55 @@ +/* -*- 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_FILTER_IMPL_H +#define INCLUDED_GSM_BURST_SDCCH_SUBSLOT_FILTER_IMPL_H + +#include <grgsm/flow_control/burst_sdcch_subslot_filter.h> + +namespace gr { + namespace gsm { + + class burst_sdcch_subslot_filter_impl : public burst_sdcch_subslot_filter + { + 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 + }; + subslot_filter_mode d_mode; + unsigned int d_subslot; + public: + burst_sdcch_subslot_filter_impl(subslot_filter_mode mode, unsigned int subslot); + ~burst_sdcch_subslot_filter_impl(); + void process_burst(pmt::pmt_t msg); + }; + + } // namespace gsm +} // namespace gr + +#endif /* INCLUDED_GSM_BURST_SDCCH_SUBSLOT_FILTER_IMPL_H */ |