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5
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1 /*
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2 * SpanDSP - a series of DSP components for telephony
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3 *
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4 * v29_tests.c
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5 *
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6 * Written by Steve Underwood <steveu@coppice.org>
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7 *
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8 * Copyright (C) 2003 Steve Underwood
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9 *
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10 * All rights reserved.
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11 *
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12 * This program is free software; you can redistribute it and/or modify
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13 * it under the terms of the GNU General Public License version 2, as
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14 * published by the Free Software Foundation.
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15 *
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16 * This program is distributed in the hope that it will be useful,
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17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 * GNU General Public License for more details.
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20 *
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21 * You should have received a copy of the GNU General Public License
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22 * along with this program; if not, write to the Free Software
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23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 *
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25 * $Id: v29_tests.c,v 1.82 2006/11/19 14:07:27 steveu Exp $
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26 */
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27
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28 /*! \page v29_tests_page V.29 modem tests
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29 \section v29_tests_page_sec_1 What does it do?
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30 These tests test one way paths, as V.29 is a half-duplex modem. They allow either:
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31
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32 - A V.29 transmit modem to feed a V.29 receive modem through a telephone line
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33 model. BER testing is then used to evaluate performance under various line
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34 conditions. This is effective for testing the basic performance of the
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35 receive modem. It is also the only test mode provided for evaluating the
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36 transmit modem.
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37
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38 - A V.29 receive modem is used to decode V.29 audio, stored in a wave file.
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39 This is good way to evaluate performance with audio recorded from other
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40 models of modem, and with real world problematic telephone lines.
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41
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42 If the appropriate GUI environment exists, the tests are built such that a visual
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43 display of modem status is maintained.
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44
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45 \section v29_tests_page_sec_2 How is it used?
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46 */
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47
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48 #ifdef HAVE_CONFIG_H
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49 #include "config.h"
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50 #endif
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51
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52 #if defined(HAVE_FL_FL_H) && defined(HAVE_FL_FL_CARTESIAN_H) && defined(HAVE_FL_FL_AUDIO_METER_H)
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53 #define ENABLE_GUI
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54 #endif
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55
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56 #include <inttypes.h>
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57 #include <stdlib.h>
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58 #include <stdio.h>
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59 #include <fcntl.h>
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60 #include <string.h>
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61 #if defined(HAVE_TGMATH_H)
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62 #include <tgmath.h>
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63 #endif
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64 #if defined(HAVE_MATH_H)
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65 #include <math.h>
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66 #endif
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67 #include <assert.h>
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68 #include <audiofile.h>
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69 #include <tiffio.h>
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70
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71 #include "spandsp.h"
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72 #include "test_utils.h"
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73 #include "line_model.h"
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74 #if defined(ENABLE_GUI)
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75 #include "modem_monitor.h"
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76 #include "line_model_monitor.h"
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77 #endif
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78
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79 #define BLOCK_LEN 160
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80
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81 #define OUT_FILE_NAME "v29.wav"
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82
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83 char *decode_test_file = NULL;
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84 int use_gui = FALSE;
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85
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86 int symbol_no = 0;
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87 int rx_bits = 0;
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88
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89 bert_state_t bert;
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90 one_way_line_model_state_t *line_model;
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91
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92 #if defined(ENABLE_GUI)
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93 qam_monitor_t *qam_monitor;
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94 #endif
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95
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96 bert_results_t latest_results;
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97
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98 static void reporter(void *user_data, int reason, bert_results_t *results)
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99 {
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100 switch (reason)
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101 {
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102 case BERT_REPORT_SYNCED:
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103 printf("BERT report synced\n");
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104 break;
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105 case BERT_REPORT_UNSYNCED:
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106 printf("BERT report unsync'ed\n");
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107 break;
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108 case BERT_REPORT_REGULAR:
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109 printf("BERT report regular - %d bits, %d bad bits, %d resyncs\n", results->total_bits, results->bad_bits, results->resyncs);
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110 memcpy(&latest_results, results, sizeof(latest_results));
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111 break;
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112 case BERT_REPORT_GT_10_2:
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113 printf("BERT report > 1 in 10^2\n");
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114 break;
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115 case BERT_REPORT_LT_10_2:
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116 printf("BERT report < 1 in 10^2\n");
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117 break;
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118 case BERT_REPORT_LT_10_3:
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119 printf("BERT report < 1 in 10^3\n");
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120 break;
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121 case BERT_REPORT_LT_10_4:
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122 printf("BERT report < 1 in 10^4\n");
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123 break;
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124 case BERT_REPORT_LT_10_5:
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125 printf("BERT report < 1 in 10^5\n");
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126 break;
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127 case BERT_REPORT_LT_10_6:
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128 printf("BERT report < 1 in 10^6\n");
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129 break;
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130 case BERT_REPORT_LT_10_7:
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131 printf("BERT report < 1 in 10^7\n");
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132 break;
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133 default:
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134 printf("BERT report reason %d\n", reason);
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135 break;
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136 }
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137 }
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138 /*- End of function --------------------------------------------------------*/
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139
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140 static void v29putbit(void *user_data, int bit)
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141 {
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142 v29_rx_state_t *rx;
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143 int i;
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144 int len;
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145 complexf_t *coeffs;
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146
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147 rx = (v29_rx_state_t *) user_data;
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148 if (bit < 0)
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149 {
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150 /* Special conditions */
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151 switch (bit)
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152 {
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153 case PUTBIT_TRAINING_FAILED:
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154 printf("Training failed\n");
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155 break;
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156 case PUTBIT_TRAINING_SUCCEEDED:
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157 printf("Training succeeded\n");
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158 len = v29_rx_equalizer_state(rx, &coeffs);
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159 printf("Equalizer:\n");
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160 for (i = 0; i < len; i++)
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161 printf("%3d (%15.5f, %15.5f) -> %15.5f\n", i, coeffs[i].re, coeffs[i].im, powerf(&coeffs[i]));
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162 break;
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163 case PUTBIT_CARRIER_UP:
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164 printf("Carrier up\n");
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165 break;
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166 case PUTBIT_CARRIER_DOWN:
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167 printf("Carrier down\n");
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168 break;
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169 default:
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170 printf("Eh!\n");
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171 break;
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172 }
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173 return;
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174 }
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175
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176 if (decode_test_file)
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177 printf("Rx bit %d - %d\n", rx_bits++, bit);
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178 else
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179 bert_put_bit(&bert, bit);
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180 }
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181 /*- End of function --------------------------------------------------------*/
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182
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183 static int v29getbit(void *user_data)
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184 {
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185 return bert_get_bit(&bert);
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186 }
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187 /*- End of function --------------------------------------------------------*/
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188
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189 static void qam_report(void *user_data, const complexf_t *constel, const complexf_t *target, int symbol)
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190 {
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191 int i;
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192 int len;
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193 complexf_t *coeffs;
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194 float fpower;
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195 v29_rx_state_t *rx;
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196 static float smooth_power = 0.0;
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197 static int update_interval = 100;
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198
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199 rx = (v29_rx_state_t *) user_data;
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200 if (constel)
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201 {
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202 fpower = (constel->re - target->re)*(constel->re - target->re)
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203 + (constel->im - target->im)*(constel->im - target->im);
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204 smooth_power = 0.95*smooth_power + 0.05*fpower;
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205 #if defined(ENABLE_GUI)
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206 if (use_gui)
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207 {
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208 qam_monitor_update_constel(qam_monitor, constel);
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209 qam_monitor_update_carrier_tracking(qam_monitor, v29_rx_carrier_frequency(rx));
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210 //qam_monitor_update_carrier_tracking(qam_monitor, (fpower) ? fpower : 0.001);
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211 qam_monitor_update_symbol_tracking(qam_monitor, v29_rx_symbol_timing_correction(rx));
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212 }
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213 #endif
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214 printf("%8d [%8.4f, %8.4f] [%8.4f, %8.4f] %8.4f %8.4f %9.4f %7.3f %7.1f\n",
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215 symbol_no,
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216 constel->re,
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217 constel->im,
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218 target->re,
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219 target->im,
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220 fpower,
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221 smooth_power,
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222 v29_rx_carrier_frequency(rx),
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223 v29_rx_signal_power(rx),
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224 v29_rx_symbol_timing_correction(rx));
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225 symbol_no++;
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226 if (--update_interval <= 0)
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227 {
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228 len = v29_rx_equalizer_state(rx, &coeffs);
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229 printf("Equalizer A:\n");
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230 for (i = 0; i < len; i++)
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231 printf("%3d (%15.5f, %15.5f) -> %15.5f\n", i, coeffs[i].re, coeffs[i].im, powerf(&coeffs[i]));
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232 #if defined(ENABLE_GUI)
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233 if (use_gui)
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234 qam_monitor_update_equalizer(qam_monitor, coeffs, len);
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235 #endif
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236 update_interval = 100;
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237 }
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238 }
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239 }
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240 /*- End of function --------------------------------------------------------*/
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241
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242 int main(int argc, char *argv[])
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243 {
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244 v29_rx_state_t rx;
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245 v29_tx_state_t tx;
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246 bert_results_t bert_results;
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247 int16_t gen_amp[BLOCK_LEN];
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248 int16_t amp[BLOCK_LEN];
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249 AFfilehandle inhandle;
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250 AFfilehandle outhandle;
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251 AFfilesetup filesetup;
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252 int outframes;
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253 int samples;
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254 int i;
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255 int tep;
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256 int test_bps;
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257 int noise_level;
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258 int signal_level;
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259 int bits_per_test;
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260 int line_model_no;
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261 int block;
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262 int log_audio;
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263 int channel_codec;
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264
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265 channel_codec = MUNGE_CODEC_NONE;
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266 test_bps = 9600;
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267 tep = FALSE;
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268 line_model_no = 0;
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269 decode_test_file = NULL;
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270 use_gui = FALSE;
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271 noise_level = -70;
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272 signal_level = -13;
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273 bits_per_test = 50000;
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274 log_audio = FALSE;
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275 for (i = 1; i < argc; i++)
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276 {
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277 if (strcmp(argv[i], "-b") == 0)
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278 {
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279 bits_per_test = atoi(argv[++i]);
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280 continue;
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281 }
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282 if (strcmp(argv[i], "-c") == 0)
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283 {
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284 channel_codec = atoi(argv[++i]);
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285 continue;
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286 }
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287 if (strcmp(argv[i], "-d") == 0)
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288 {
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289 decode_test_file = argv[++i];
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290 continue;
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291 }
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292 if (strcmp(argv[i], "-t") == 0)
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293 {
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294 tep = TRUE;
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295 continue;
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296 }
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297 if (strcmp(argv[i], "-g") == 0)
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298 {
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299 use_gui = TRUE;
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300 continue;
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301 }
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302 if (strcmp(argv[i], "-l") == 0)
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303 {
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304 log_audio = TRUE;
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305 continue;
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306 }
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307 if (strcmp(argv[i], "-m") == 0)
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308 {
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309 line_model_no = atoi(argv[++i]);
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310 continue;
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311 }
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312 if (strcmp(argv[i], "-n") == 0)
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313 {
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314 noise_level = atoi(argv[++i]);
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315 continue;
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316 }
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317 if (strcmp(argv[i], "-s") == 0)
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318 {
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319 signal_level = atoi(argv[++i]);
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320 continue;
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321 }
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322 if (strcmp(argv[i], "9600") == 0)
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323 test_bps = 9600;
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324 else if (strcmp(argv[i], "7200") == 0)
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325 test_bps = 7200;
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326 else if (strcmp(argv[i], "4800") == 0)
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327 test_bps = 4800;
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328 else
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329 {
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330 fprintf(stderr, "Invalid bit rate\n");
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331 exit(2);
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332 }
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333 }
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334 inhandle = NULL;
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335 outhandle = NULL;
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336
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337 filesetup = AF_NULL_FILESETUP;
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338 if (log_audio)
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339 {
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340 if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
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341 {
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342 fprintf(stderr, " Failed to create file setup\n");
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343 exit(2);
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344 }
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345 afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
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346 afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
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347 afInitFileFormat(filesetup, AF_FILE_WAVE);
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348 afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
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349 if ((outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup)) == AF_NULL_FILEHANDLE)
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350 {
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351 fprintf(stderr, " Cannot create wave file '%s'\n", OUT_FILE_NAME);
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352 exit(2);
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353 }
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354 }
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355
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356 if (decode_test_file)
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357 {
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358 /* We will decode the audio from a wave file. */
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359 if ((inhandle = afOpenFile(decode_test_file, "r", NULL)) == AF_NULL_FILEHANDLE)
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360 {
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361 fprintf(stderr, " Cannot open wave file '%s'\n", decode_test_file);
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362 exit(2);
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363 }
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364 }
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365 else
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366 {
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367 /* We will generate V.29 audio, and add some noise to it. */
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368 v29_tx_init(&tx, test_bps, tep, v29getbit, NULL);
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369 v29_tx_power(&tx, signal_level);
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370 /* Move the carrier off a bit */
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371 tx.carrier_phase_rate = dds_phase_ratef(1710.0f);
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372 tx.carrier_phase = 0;
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373
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374 bert_init(&bert, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
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375 bert_set_report(&bert, 10000, reporter, NULL);
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376
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377 if ((line_model = one_way_line_model_init(line_model_no, (float) noise_level, channel_codec)) == NULL)
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378 {
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379 fprintf(stderr, " Failed to create line model\n");
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380 exit(2);
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381 }
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382 }
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383
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384 v29_rx_init(&rx, test_bps, v29putbit, &rx);
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385 v29_rx_signal_cutoff(&rx, -45.5);
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386 v29_rx_set_qam_report_handler(&rx, qam_report, (void *) &rx);
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387 /* Rotate the starting phase */
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388 rx.carrier_phase = 0x80000000;
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389 span_log_set_level(&rx.logging, SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW);
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390 span_log_set_tag(&rx.logging, "V.29-rx");
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391
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392 #if defined(ENABLE_GUI)
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393 if (use_gui)
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394 {
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395 qam_monitor = qam_monitor_init(6.0, NULL);
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396 if (!decode_test_file)
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397 {
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398 start_line_model_monitor(129);
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399 line_model_monitor_line_model_update(line_model->near_filter, line_model->near_filter_len);
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400 }
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401 }
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402 #endif
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403
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404 memset(&latest_results, 0, sizeof(latest_results));
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405 for (block = 0; ; block++)
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406 {
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407 if (decode_test_file)
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408 {
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409 samples = afReadFrames(inhandle,
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410 AF_DEFAULT_TRACK,
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411 amp,
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412 BLOCK_LEN);
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413 #if defined(ENABLE_GUI)
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414 if (use_gui)
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415 qam_monitor_update_audio_level(qam_monitor, amp, samples);
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416 #endif
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417 if (samples == 0)
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418 break;
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419 }
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420 else
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421 {
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422 samples = v29_tx(&tx, gen_amp, BLOCK_LEN);
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423 #if defined(ENABLE_GUI)
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424 if (use_gui)
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425 qam_monitor_update_audio_level(qam_monitor, gen_amp, samples);
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426 #endif
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427 if (samples == 0)
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428 {
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429 /* Push a little silence through, to ensure all the data bits get out of the buffers */
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430 memset(amp, 0, BLOCK_LEN*sizeof(int16_t));
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431 v29_rx(&rx, amp, BLOCK_LEN);
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432
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433 /* Note that we might get a few bad bits as the carrier shuts down. */
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434 bert_result(&bert, &bert_results);
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435 fprintf(stderr, "Final result %ddBm0, %d bits, %d bad bits, %d resyncs\n", signal_level, bert_results.total_bits, bert_results.bad_bits, bert_results.resyncs);
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436 fprintf(stderr, "Last report %ddBm0, %d bits, %d bad bits, %d resyncs\n", signal_level, latest_results.total_bits, latest_results.bad_bits, latest_results.resyncs);
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437 /* See if bit errors are appearing yet. Also check we are getting enough bits out of the receiver. The last regular report
|
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438 should be error free, though the final report will generally contain bits errors as the carrier was dying. The total
|
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439 number of bits out of the receiver should be at least the number we sent. Also, since BERT sync should have occurred
|
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440 rapidly at the start of transmission, the last report should have occurred at not much less than the total number of
|
|
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441 bits we sent. */
|
|
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442 if (bert_results.total_bits < bits_per_test
|
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443 ||
|
|
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444 latest_results.total_bits < bits_per_test - 100
|
|
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445 ||
|
|
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446 latest_results.bad_bits != 0)
|
|
|
447 {
|
|
|
448 break;
|
|
|
449 }
|
|
|
450 memset(&latest_results, 0, sizeof(latest_results));
|
|
|
451 signal_level--;
|
|
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452 v29_tx_restart(&tx, test_bps, tep);
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|
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453 v29_tx_power(&tx, signal_level);
|
|
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454 v29_rx_restart(&rx, test_bps, FALSE);
|
|
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455 rx.eq_put_step = rand()%(48*10/3);
|
|
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456 bert_init(&bert, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
|
|
|
457 bert_set_report(&bert, 10000, reporter, NULL);
|
|
|
458 one_way_line_model_release(line_model);
|
|
|
459 if ((line_model = one_way_line_model_init(line_model_no, (float) noise_level, channel_codec)) == NULL)
|
|
|
460 {
|
|
|
461 fprintf(stderr, " Failed to create line model\n");
|
|
|
462 exit(2);
|
|
|
463 }
|
|
|
464 }
|
|
|
465 if (log_audio)
|
|
|
466 {
|
|
|
467 outframes = afWriteFrames(outhandle,
|
|
|
468 AF_DEFAULT_TRACK,
|
|
|
469 gen_amp,
|
|
|
470 samples);
|
|
|
471 if (outframes != samples)
|
|
|
472 {
|
|
|
473 fprintf(stderr, " Error writing wave file\n");
|
|
|
474 exit(2);
|
|
|
475 }
|
|
|
476 }
|
|
|
477 one_way_line_model(line_model, amp, gen_amp, samples);
|
|
|
478 }
|
|
|
479 #if defined(ENABLE_GUI)
|
|
|
480 if (use_gui && !decode_test_file)
|
|
|
481 line_model_monitor_line_spectrum_update(amp, samples);
|
|
|
482 #endif
|
|
|
483 v29_rx(&rx, amp, samples);
|
|
|
484 if (decode_test_file == NULL && block%500 == 0)
|
|
|
485 printf("Noise level is %d\n", noise_level);
|
|
|
486 }
|
|
|
487 if (decode_test_file)
|
|
|
488 {
|
|
|
489 #if defined(ENABLE_GUI)
|
|
|
490 if (use_gui)
|
|
|
491 qam_wait_to_end(qam_monitor);
|
|
|
492 #endif
|
|
|
493 }
|
|
|
494 else
|
|
|
495 {
|
|
|
496 bert_result(&bert, &bert_results);
|
|
|
497 fprintf(stderr, "At completion:\n");
|
|
|
498 fprintf(stderr, "Final result %ddBm0, %d bits, %d bad bits, %d resyncs\n", signal_level, bert_results.total_bits, bert_results.bad_bits, bert_results.resyncs);
|
|
|
499 fprintf(stderr, "Last report %ddBm0, %d bits, %d bad bits, %d resyncs\n", signal_level, latest_results.total_bits, latest_results.bad_bits, latest_results.resyncs);
|
|
|
500 one_way_line_model_release(line_model);
|
|
|
501
|
|
|
502 if (signal_level > -43)
|
|
|
503 {
|
|
|
504 printf("Tests failed.\n");
|
|
|
505 exit(2);
|
|
|
506 }
|
|
|
507
|
|
|
508 printf("Tests passed.\n");
|
|
|
509 }
|
|
|
510 if (log_audio)
|
|
|
511 {
|
|
|
512 if (afCloseFile(outhandle))
|
|
|
513 {
|
|
|
514 fprintf(stderr, " Cannot close wave file '%s'\n", OUT_FILE_NAME);
|
|
|
515 exit(2);
|
|
|
516 }
|
|
|
517 afFreeFileSetup(filesetup);
|
|
|
518 }
|
|
|
519 return 0;
|
|
|
520 }
|
|
|
521 /*- End of function --------------------------------------------------------*/
|
|
|
522 /*- End of file ------------------------------------------------------------*/
|
