| /* -*- c++ -*- */ |
| /* @file |
| * @author Piotr Krysik <ptrkrysik@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 <grgsm/gsmtap.h> |
| #include <grgsm/gsm_constants.h> |
| #include "preprocess_tx_burst_impl.h" |
| |
| namespace gr { |
| namespace gsm { |
| |
| preprocess_tx_burst::sptr |
| preprocess_tx_burst::make() |
| { |
| return gnuradio::get_initial_sptr |
| (new preprocess_tx_burst_impl()); |
| } |
| |
| /* |
| * The private constructor |
| */ |
| preprocess_tx_burst_impl::preprocess_tx_burst_impl() |
| : gr::block("preprocess_tx_burst", |
| gr::io_signature::make(0, 0, 0), |
| gr::io_signature::make(0, 0, 0)) |
| { |
| message_port_register_in(pmt::intern("bursts_in")); |
| message_port_register_out(pmt::intern("bursts_out")); |
| |
| set_msg_handler(pmt::intern("bursts_in"), boost::bind(&preprocess_tx_burst_impl::process_burst, this, _1)); |
| } |
| |
| /* |
| * Our virtual destructor. |
| */ |
| preprocess_tx_burst_impl::~preprocess_tx_burst_impl() |
| { |
| } |
| |
| void preprocess_tx_burst_impl::process_burst(pmt::pmt_t burst) |
| { |
| int8_t * header_bits = (int8_t *)(pmt::blob_data(pmt::cdr(burst))); |
| int8_t * burst_bits = (int8_t *)(pmt::blob_data(pmt::cdr(burst)))+sizeof(gsmtap_hdr); |
| |
| pmt::pmt_t header_bits_pmt = pmt::make_blob(header_bits,sizeof(gsmtap_hdr)); |
| |
| size_t burst_size = pmt::blob_length(pmt::cdr(burst))-sizeof(gsmtap_hdr); |
| if(((gsmtap_hdr*)header_bits)->sub_type == GSMTAP_BURST_ACCESS){ //cut unneeded bits from the end of access bursts |
| burst_size = ACCESS_BURST_SIZE; |
| } |
| pmt::pmt_t burst_bits_pmt = pmt::make_blob(burst_bits, burst_size); |
| |
| pmt::pmt_t pdu_first_part = pmt::car(burst); |
| // pmt::pmt_t new_pdu_first_part = pmt::dict_add( pdu_first_part, pmt::intern("gsmtap_header"), header_bits_pmt ); |
| pmt::pmt_t new_pdu_first_part = pdu_first_part; |
| |
| pmt::pmt_t new_msg = pmt::cons(new_pdu_first_part, burst_bits_pmt); |
| message_port_pub(pmt::intern("bursts_out"), new_msg); |
| } |
| } /* namespace gsm */ |
| } /* namespace gr */ |
| |