105 lines
3.6 KiB
C++
105 lines
3.6 KiB
C++
/* -*- 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>
|
|
|
|
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
|
|
};
|
|
|
|
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_subslots_sdcch4(subslots_sdcch4),
|
|
d_subslots_sdcch8(subslots_sdcch8)
|
|
{
|
|
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 */
|