From e09ae11f04130d2666ffb5442cb8ce204e3ac3d8 Mon Sep 17 00:00:00 2001
From: Piotr Krysik <perper@o2.pl>
Date: Sat, 6 Jun 2009 23:10:21 +0200
Subject: next code cleanup, two functions introduced, should be removed before
 the end of this branch

---
 src/lib/gsm_receiver_config.h | 143 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 141 insertions(+), 2 deletions(-)

(limited to 'src/lib/gsm_receiver_config.h')

diff --git a/src/lib/gsm_receiver_config.h b/src/lib/gsm_receiver_config.h
index 1d4cf1d..9222602 100644
--- a/src/lib/gsm_receiver_config.h
+++ b/src/lib/gsm_receiver_config.h
@@ -1,11 +1,150 @@
 //
 // C++ Implementation: gsm_receiver_config
 //
-// Description: 
-//
+// Description:
+// This file contains classes which define gsm_receiver configuration
+// and the burst_counter which is used to store internal state of the receiver
+// when it's synchronized
 //
 // Author: Piotr Krysik <perper@o2.pl>, (C) 2009
 //
 // Copyright: See COPYING file that comes with this distribution
 //
 //
+#ifndef INCLUDED_GSM_RECEIVER_CONFIG_H
+#define INCLUDED_GSM_RECEIVER_CONFIG_H
+
+#include <vector>
+#include <algorithm>
+#include <math.h>
+#include <stdint.h>
+#include <gsm_constants.h>
+
+typedef enum {empty, fcch_burst, sch_burst, normal_burst, rach_burst, dummy} burst_type;
+typedef enum {unknown, multiframe_26, multiframe_51} multiframe_type;
+
+class multiframe_configuration
+{
+  private:
+    multiframe_type d_type;
+    std::vector<burst_type> d_burst_types;
+  public:
+    multiframe_configuration() {
+      d_type = unknown;
+      fill(d_burst_types.begin(), d_burst_types.end(), empty);
+    }
+
+    ~multiframe_configuration() {}
+
+    void set_type(multiframe_type type) {
+      if (type == multiframe_26) {
+        d_burst_types.resize(26);
+      } else {
+        d_burst_types.resize(51);
+      }
+
+      d_type = type;
+    }
+
+    void set_burst_type(int nr, burst_type type) {
+      d_burst_types[nr] = type;
+    }
+
+    multiframe_type get_type() {
+      return d_type;
+    }
+
+    burst_type get_burst_type(int nr) {
+      return d_burst_types[nr];
+    }
+};
+
+class burst_counter
+{
+  private:
+    const int d_OSR;
+    uint32_t d_t1, d_t2, d_t3, d_timeslot_nr;
+    double d_offset_fractional;
+    double d_offset_integer;
+  public:
+    burst_counter(int osr):
+        d_OSR(osr),
+        d_t1(0),
+        d_t2(0),
+        d_t3(0),
+        d_timeslot_nr(0),
+        d_offset_fractional(0.0),
+        d_offset_integer(0.0) {
+    }
+
+    burst_counter(int osr, uint32_t t1, uint32_t t2, uint32_t t3, uint32_t timeslot_nr):
+        d_OSR(osr),
+        d_t1(t1),
+        d_t2(t2),
+        d_t3(t3),
+        d_timeslot_nr(timeslot_nr),
+        d_offset_fractional(0.0),
+        d_offset_integer(0.0) {
+      double first_sample_position = (get_frame_nr() * 8 + timeslot_nr) * TS_BITS;
+      d_offset_integer = floor(first_sample_position);
+      d_offset_fractional = first_sample_position - floor(first_sample_position);
+    }
+
+    burst_counter & operator++(int);
+    void set(uint32_t t1, uint32_t t2, uint32_t t3, uint32_t timeslot_nr);
+
+    uint32_t get_t1() {
+      return d_t1;
+    }
+
+    uint32_t get_t2() {
+      return d_t2;
+    }
+
+    uint32_t get_t3() {
+      return d_t3;
+    }
+
+    uint32_t get_timeslot_nr() {
+      return d_timeslot_nr;
+    }
+
+    uint32_t get_frame_nr() {
+      return (51 * 26 * d_t1) + (51 * (((d_t3 + 26) - d_t2) % 26)) + d_t3;
+    }
+
+    unsigned get_offset() {
+      return (unsigned)d_offset_integer;
+    }
+};
+
+class channel_configuration
+{
+  private:
+    multiframe_configuration d_timeslots_descriptions[TS_PER_FRAME];
+  public:
+    channel_configuration() {
+      for (int i = 0; i < TS_PER_FRAME; i++) {
+        d_timeslots_descriptions[i].set_type(unknown);
+      }
+    }
+
+    void set_multiframe_type(int timeslot_nr, multiframe_type type) {
+      d_timeslots_descriptions[timeslot_nr].set_type(type);
+    }
+
+    void set_burst_types(int timeslot_nr, const unsigned mapping[], unsigned mapping_size, burst_type b_type) {
+      unsigned i;
+      for (i = 0; i < mapping_size; i++) {
+        d_timeslots_descriptions[timeslot_nr].set_burst_type(mapping[i], b_type);
+      }
+    }
+
+    void set_single_burst_type(int timeslot_nr, int burst_nr, burst_type b_type) {
+      d_timeslots_descriptions[timeslot_nr].set_burst_type(burst_nr, b_type);
+    }
+
+    burst_type get_burst_type(burst_counter burst_nr);
+};
+
+#endif /* INCLUDED_GSM_RECEIVER_CONFIG_H */
-- 
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