From ccb5e689e1fce642c23ddfb091bee7bedffd0b55 Mon Sep 17 00:00:00 2001
From: Piotr Krysik <ptrkrysik@gmail.com>
Date: Tue, 7 Nov 2017 19:34:22 +0100
Subject: Added tx bursts preprocessing block

---
 lib/transmitter/CMakeLists.txt              |  1 +
 lib/transmitter/preprocess_tx_burst_impl.cc | 85 +++++++++++++++++++++++++++++
 lib/transmitter/preprocess_tx_burst_impl.h  | 47 ++++++++++++++++
 3 files changed, 133 insertions(+)
 create mode 100644 lib/transmitter/preprocess_tx_burst_impl.cc
 create mode 100644 lib/transmitter/preprocess_tx_burst_impl.h

(limited to 'lib/transmitter')

diff --git a/lib/transmitter/CMakeLists.txt b/lib/transmitter/CMakeLists.txt
index 31658fd..c61654a 100644
--- a/lib/transmitter/CMakeLists.txt
+++ b/lib/transmitter/CMakeLists.txt
@@ -19,4 +19,5 @@
 
 add_sources(
    txtime_setter_impl.cc
+   preprocess_tx_burst_impl.cc
 )
diff --git a/lib/transmitter/preprocess_tx_burst_impl.cc b/lib/transmitter/preprocess_tx_burst_impl.cc
new file mode 100644
index 0000000..5d3ae9a
--- /dev/null
+++ b/lib/transmitter/preprocess_tx_burst_impl.cc
@@ -0,0 +1,85 @@
+/* -*- 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 */
+
diff --git a/lib/transmitter/preprocess_tx_burst_impl.h b/lib/transmitter/preprocess_tx_burst_impl.h
new file mode 100644
index 0000000..27fc508
--- /dev/null
+++ b/lib/transmitter/preprocess_tx_burst_impl.h
@@ -0,0 +1,47 @@
+/* -*- 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.
+ * 
+ */
+
+#ifndef INCLUDED_GSM_PREPROCESS_TX_BURST_IMPL_H
+#define INCLUDED_GSM_PREPROCESS_TX_BURST_IMPL_H
+
+#include <grgsm/transmitter/preprocess_tx_burst.h>
+#include <grgsm/misc_utils/time_spec.h>
+#include <grgsm/misc_utils/fn_time.h>
+
+namespace gr {
+  namespace gsm {
+
+    class preprocess_tx_burst_impl : public preprocess_tx_burst
+    {
+     private:
+      void process_burst(pmt::pmt_t burst);
+      
+     public:
+      preprocess_tx_burst_impl();
+      ~preprocess_tx_burst_impl();
+    };
+
+  } // namespace gsm
+} // namespace gr
+
+#endif /* INCLUDED_GSM_PREPROCESS_TX_BURST_IMPL_H */
+
-- 
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