86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
/* -*- c++ -*- */
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/* @file
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* @author Piotr Krysik <ptrkrysik@gmail.com>
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* @section LICENSE
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*
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* Gr-gsm is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* Gr-gsm is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with gr-gsm; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gnuradio/io_signature.h>
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#include <grgsm/gsmtap.h>
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#include <grgsm/gsm_constants.h>
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#include "preprocess_tx_burst_impl.h"
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namespace gr {
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namespace gsm {
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preprocess_tx_burst::sptr
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preprocess_tx_burst::make()
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{
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return gnuradio::get_initial_sptr
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(new preprocess_tx_burst_impl());
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}
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/*
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* The private constructor
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*/
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preprocess_tx_burst_impl::preprocess_tx_burst_impl()
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: gr::block("preprocess_tx_burst",
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gr::io_signature::make(0, 0, 0),
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gr::io_signature::make(0, 0, 0))
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{
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message_port_register_in(pmt::intern("bursts_in"));
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message_port_register_out(pmt::intern("bursts_out"));
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set_msg_handler(pmt::intern("bursts_in"), boost::bind(&preprocess_tx_burst_impl::process_burst, this, _1));
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}
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/*
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* Our virtual destructor.
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*/
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preprocess_tx_burst_impl::~preprocess_tx_burst_impl()
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{
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}
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void preprocess_tx_burst_impl::process_burst(pmt::pmt_t burst)
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{
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int8_t * header_bits = (int8_t *)(pmt::blob_data(pmt::cdr(burst)));
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int8_t * burst_bits = (int8_t *)(pmt::blob_data(pmt::cdr(burst)))+sizeof(gsmtap_hdr);
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pmt::pmt_t header_bits_pmt = pmt::make_blob(header_bits,sizeof(gsmtap_hdr));
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size_t burst_size = pmt::blob_length(pmt::cdr(burst))-sizeof(gsmtap_hdr);
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if(((gsmtap_hdr*)header_bits)->sub_type == GSMTAP_BURST_ACCESS){ //cut unneeded bits from the end of access bursts
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burst_size = ACCESS_BURST_SIZE;
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}
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pmt::pmt_t burst_bits_pmt = pmt::make_blob(burst_bits, burst_size);
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pmt::pmt_t pdu_first_part = pmt::car(burst);
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// pmt::pmt_t new_pdu_first_part = pmt::dict_add( pdu_first_part, pmt::intern("gsmtap_header"), header_bits_pmt );
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pmt::pmt_t new_pdu_first_part = pdu_first_part;
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pmt::pmt_t new_msg = pmt::cons(new_pdu_first_part, burst_bits_pmt);
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message_port_pub(pmt::intern("bursts_out"), new_msg);
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}
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} /* namespace gsm */
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} /* namespace gr */
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