piotr | 437f546 | 2014-02-04 17:57:25 +0100 | [diff] [blame] | 1 | /* -*- c++ -*- */ |
| 2 | /* |
| 3 | * @file |
| 4 | * @author Piotr Krysik <pkrysik@stud.elka.pw.edu.pl> |
| 5 | * @section LICENSE |
| 6 | * |
| 7 | * GNU Radio is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 3, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | * GNU Radio is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with GNU Radio; see the file COPYING. If not, write to |
| 19 | * the Free Software Foundation, Inc., 51 Franklin Street, |
| 20 | * Boston, MA 02110-1301, USA. |
| 21 | * |
| 22 | * @section DESCRIPTION |
| 23 | * This file contains classes which define gsm_receiver configuration |
| 24 | * and the burst_counter which is used to store internal state of the receiver |
| 25 | * when it's synchronized |
| 26 | */ |
| 27 | #ifndef INCLUDED_GSM_RECEIVER_CONFIG_H |
| 28 | #define INCLUDED_GSM_RECEIVER_CONFIG_H |
| 29 | |
| 30 | #include <vector> |
| 31 | #include <algorithm> |
| 32 | #include <math.h> |
| 33 | #include <stdint.h> |
| 34 | #include <gsm_constants.h> |
| 35 | |
| 36 | class multiframe_configuration |
| 37 | { |
| 38 | private: |
| 39 | multiframe_type d_type; |
| 40 | std::vector<burst_type> d_burst_types; |
| 41 | public: |
| 42 | multiframe_configuration() { |
| 43 | d_type = unknown; |
| 44 | fill(d_burst_types.begin(), d_burst_types.end(), empty); |
| 45 | } |
| 46 | |
| 47 | ~multiframe_configuration() {} |
| 48 | |
| 49 | void set_type(multiframe_type type) { |
| 50 | if (type == multiframe_26) { |
| 51 | d_burst_types.resize(26); |
| 52 | } else { |
| 53 | d_burst_types.resize(51); |
| 54 | } |
| 55 | |
| 56 | d_type = type; |
| 57 | } |
| 58 | |
| 59 | void set_burst_type(int nr, burst_type type) { |
| 60 | d_burst_types[nr] = type; |
| 61 | } |
| 62 | |
| 63 | multiframe_type get_type() { |
| 64 | return d_type; |
| 65 | } |
| 66 | |
| 67 | burst_type get_burst_type(int nr) { |
| 68 | return d_burst_types[nr]; |
| 69 | } |
| 70 | }; |
| 71 | |
| 72 | class burst_counter |
| 73 | { |
| 74 | private: |
| 75 | const int d_OSR; |
| 76 | uint32_t d_t1, d_t2, d_t3, d_timeslot_nr; |
| 77 | double d_offset_fractional; |
| 78 | double d_offset_integer; |
| 79 | public: |
| 80 | burst_counter(int osr): |
| 81 | d_OSR(osr), |
| 82 | d_t1(0), |
| 83 | d_t2(0), |
| 84 | d_t3(0), |
| 85 | d_timeslot_nr(0), |
| 86 | d_offset_fractional(0.0), |
| 87 | d_offset_integer(0.0) { |
| 88 | } |
| 89 | |
| 90 | burst_counter(int osr, uint32_t t1, uint32_t t2, uint32_t t3, uint32_t timeslot_nr): |
| 91 | d_OSR(osr), |
| 92 | d_t1(t1), |
| 93 | d_t2(t2), |
| 94 | d_t3(t3), |
| 95 | d_timeslot_nr(timeslot_nr), |
| 96 | d_offset_fractional(0.0), |
| 97 | d_offset_integer(0.0) { |
piotr | 7f3f366 | 2014-07-08 16:47:53 +0200 | [diff] [blame] | 98 | d_offset_integer = 0; |
| 99 | d_offset_fractional = 0; |
piotr | 437f546 | 2014-02-04 17:57:25 +0100 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | burst_counter & operator++(int); |
| 103 | void set(uint32_t t1, uint32_t t2, uint32_t t3, uint32_t timeslot_nr); |
| 104 | |
| 105 | uint32_t get_t1() { |
| 106 | return d_t1; |
| 107 | } |
| 108 | |
| 109 | uint32_t get_t2() { |
| 110 | return d_t2; |
| 111 | } |
| 112 | |
| 113 | uint32_t get_t3() { |
| 114 | return d_t3; |
| 115 | } |
| 116 | |
| 117 | uint32_t get_timeslot_nr() { |
| 118 | return d_timeslot_nr; |
| 119 | } |
| 120 | |
| 121 | uint32_t get_frame_nr() { |
| 122 | return (51 * 26 * d_t1) + (51 * (((d_t3 + 26) - d_t2) % 26)) + d_t3; |
| 123 | } |
| 124 | |
| 125 | uint32_t get_frame_nr_mod() { |
| 126 | return (d_t1 << 11) + (d_t3 << 5) + d_t2; |
| 127 | } |
| 128 | |
| 129 | unsigned get_offset() { |
| 130 | return (unsigned)d_offset_integer; |
| 131 | } |
| 132 | }; |
| 133 | |
| 134 | class channel_configuration |
| 135 | { |
| 136 | private: |
| 137 | multiframe_configuration d_timeslots_descriptions[TS_PER_FRAME]; |
| 138 | public: |
| 139 | channel_configuration() { |
| 140 | for (int i = 0; i < TS_PER_FRAME; i++) { |
| 141 | d_timeslots_descriptions[i].set_type(unknown); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | void set_multiframe_type(int timeslot_nr, multiframe_type type) { |
| 146 | d_timeslots_descriptions[timeslot_nr].set_type(type); |
| 147 | } |
| 148 | |
| 149 | void set_burst_types(int timeslot_nr, const unsigned mapping[], unsigned mapping_size, burst_type b_type) { |
| 150 | unsigned i; |
| 151 | for (i = 0; i < mapping_size; i++) { |
| 152 | d_timeslots_descriptions[timeslot_nr].set_burst_type(mapping[i], b_type); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | void set_single_burst_type(int timeslot_nr, int burst_nr, burst_type b_type) { |
| 157 | d_timeslots_descriptions[timeslot_nr].set_burst_type(burst_nr, b_type); |
| 158 | } |
| 159 | |
| 160 | burst_type get_burst_type(burst_counter burst_nr); |
| 161 | }; |
| 162 | |
| 163 | #endif /* INCLUDED_GSM_RECEIVER_CONFIG_H */ |