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/* -*- 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 */
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