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5
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1 #define ENABLE_V17
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2 /*
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3 * SpanDSP - a series of DSP components for telephony
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4 *
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5 * v17_tests.c
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6 *
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7 * Written by Steve Underwood <steveu@coppice.org>
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8 *
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9 * Copyright (C) 2004 Steve Underwood
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10 *
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11 * All rights reserved.
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12 *
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13 * This program is free software; you can redistribute it and/or modify
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14 * it under the terms of the GNU General Public License version 2, as
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15 * published by the Free Software Foundation.
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16 *
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17 * This program is distributed in the hope that it will be useful,
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18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 * GNU General Public License for more details.
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21 *
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22 * You should have received a copy of the GNU General Public License
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23 * along with this program; if not, write to the Free Software
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24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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25 *
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26 * $Id: v17_tests.c,v 1.60 2006/11/19 14:07:27 steveu Exp $
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27 */
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28
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29 /*! \page v17_tests_page V.17 modem tests
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30 \section v17_tests_page_sec_1 What does it do?
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31 These tests test one way paths, as V.17 is a half-duplex modem. They allow either:
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32
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33 - A V.17 transmit modem to feed a V.17 receive modem through a telephone line
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34 model. BER testing is then used to evaluate performance under various line
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35 conditions. This is effective for testing the basic performance of the
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36 receive modem. It is also the only test mode provided for evaluating the
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37 transmit modem.
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38
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39 - A V.17 receive modem is used to decode V.17 audio, stored in a wave file.
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40 This is good way to evaluate performance with audio recorded from other
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41 models of modem, and with real world problematic telephone lines.
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42
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43 If the appropriate GUI environment exists, the tests are built such that a visual
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44 display of modem status is maintained.
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45
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46 \section v17_tests_page_sec_2 How is it used?
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47 */
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48
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49 #ifdef HAVE_CONFIG_H
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50 #include "config.h"
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51 #endif
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52
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53 #if defined(HAVE_FL_FL_H) && defined(HAVE_FL_FL_CARTESIAN_H) && defined(HAVE_FL_FL_AUDIO_METER_H)
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54 #define ENABLE_GUI
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55 #endif
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56
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57 #include <inttypes.h>
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58 #include <stdlib.h>
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59 #include <stdio.h>
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60 #include <fcntl.h>
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61 #include <string.h>
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62 #if defined(HAVE_TGMATH_H)
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63 #include <tgmath.h>
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64 #endif
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65 #if defined(HAVE_MATH_H)
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66 #include <math.h>
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67 #endif
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68 #include <assert.h>
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69 #include <audiofile.h>
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70 #include <tiffio.h>
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71
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72 #include "spandsp.h"
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73 #include "test_utils.h"
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74 #include "line_model.h"
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75 #if defined(ENABLE_GUI)
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76 #include "modem_monitor.h"
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77 #include "line_model_monitor.h"
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78 #endif
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79
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80 #define BLOCK_LEN 160
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81
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82 #define OUT_FILE_NAME "v17.wav"
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83
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84 char *decode_test_file = NULL;
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85 int use_gui = FALSE;
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86
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87 int symbol_no = 0;
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88
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89 int rx_bits = 0;
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90 int tx_bits = 0;
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91
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92 int test_bps;
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93
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94 bert_state_t bert;
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95 one_way_line_model_state_t *line_model;
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96
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97 #if defined(ENABLE_GUI)
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98 qam_monitor_t *qam_monitor;
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99 #endif
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100
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101 bert_results_t latest_results;
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102
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103 static void reporter(void *user_data, int reason, bert_results_t *results)
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104 {
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105 switch (reason)
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106 {
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107 case BERT_REPORT_SYNCED:
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108 printf("BERT report synced\n");
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109 break;
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110 case BERT_REPORT_UNSYNCED:
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111 printf("BERT report unsync'ed\n");
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112 break;
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113 case BERT_REPORT_REGULAR:
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114 printf("BERT report regular - %d bits, %d bad bits, %d resyncs\n", results->total_bits, results->bad_bits, results->resyncs);
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115 memcpy(&latest_results, results, sizeof(latest_results));
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116 break;
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117 case BERT_REPORT_GT_10_2:
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118 printf("BERT report > 1 in 10^2\n");
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119 break;
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120 case BERT_REPORT_LT_10_2:
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121 printf("BERT report < 1 in 10^2\n");
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122 break;
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123 case BERT_REPORT_LT_10_3:
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124 printf("BERT report < 1 in 10^3\n");
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125 break;
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126 case BERT_REPORT_LT_10_4:
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127 printf("BERT report < 1 in 10^4\n");
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128 break;
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129 case BERT_REPORT_LT_10_5:
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130 printf("BERT report < 1 in 10^5\n");
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131 break;
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132 case BERT_REPORT_LT_10_6:
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133 printf("BERT report < 1 in 10^6\n");
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134 break;
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135 case BERT_REPORT_LT_10_7:
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136 printf("BERT report < 1 in 10^7\n");
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137 break;
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138 default:
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139 printf("BERT report reason %d\n", reason);
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140 break;
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141 }
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142 }
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143 /*- End of function --------------------------------------------------------*/
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144
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145 static void v17putbit(void *user_data, int bit)
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146 {
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147 v17_rx_state_t *rx;
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148 int i;
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149 int len;
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150 complexf_t *coeffs;
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151
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152 rx = (v17_rx_state_t *) user_data;
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153 if (bit < 0)
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154 {
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155 /* Special conditions */
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156 switch (bit)
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157 {
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158 case PUTBIT_TRAINING_FAILED:
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159 printf("Training failed\n");
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160 break;
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161 case PUTBIT_TRAINING_SUCCEEDED:
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162 printf("Training succeeded\n");
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163 len = v17_rx_equalizer_state(rx, &coeffs);
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164 printf("Equalizer:\n");
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165 for (i = 0; i < len; i++)
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166 printf("%3d (%15.5f, %15.5f) -> %15.5f\n", i, coeffs[i].re, coeffs[i].im, powerf(&coeffs[i]));
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167 break;
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168 case PUTBIT_CARRIER_UP:
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169 printf("Carrier up\n");
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170 break;
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171 case PUTBIT_CARRIER_DOWN:
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172 printf("Carrier down\n");
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173 break;
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174 default:
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175 printf("Eh!\n");
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176 break;
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177 }
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178 return;
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179 }
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180
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181 #if 0
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182 printf("Rx bit %d - %d - %d\n", rx_bits++, bit, tx_bits);
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183 #else
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184 if (decode_test_file)
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185 printf("Rx bit %d - %d\n", rx_bits++, bit);
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186 else
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187 bert_put_bit(&bert, bit);
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188 #endif
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189 }
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190 /*- End of function --------------------------------------------------------*/
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191
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192 static int v17getbit(void *user_data)
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193 {
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194 #if 0
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195 if (++tx_bits >= 50000)
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196 {
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197 tx_bits = 0;
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198 return PUTBIT_END_OF_DATA;
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199 }
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200 // if (tx_bits < 200)
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201 // return (tx_bits & 1);
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202 if (tx_bits == 1)
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203 return 0;
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204 return 1;
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205 #else
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206 return bert_get_bit(&bert);
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207 #endif
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208 }
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209 /*- End of function --------------------------------------------------------*/
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210
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211 static void qam_report(void *user_data, const complexf_t *constel, const complexf_t *target, int symbol)
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212 {
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213 int i;
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214 int len;
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215 complexf_t *coeffs;
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216 float fpower;
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217 v17_rx_state_t *rx;
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218 static float smooth_power = 0.0;
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219 static int update_interval = 100;
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220
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221 rx = (v17_rx_state_t *) user_data;
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222 if (constel)
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223 {
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224 #if defined(ENABLE_GUI)
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225 if (use_gui)
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226 {
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227 qam_monitor_update_constel(qam_monitor, constel);
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228 qam_monitor_update_carrier_tracking(qam_monitor, v17_rx_carrier_frequency(rx));
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229 qam_monitor_update_symbol_tracking(qam_monitor, v17_rx_symbol_timing_correction(rx));
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230 }
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231 #endif
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232 fpower = (constel->re - target->re)*(constel->re - target->re)
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233 + (constel->im - target->im)*(constel->im - target->im);
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234 smooth_power = 0.95*smooth_power + 0.05*fpower;
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235 printf("%8d [%8.4f, %8.4f] [%8.4f, %8.4f] %2x %8.4f %8.4f %9.4f %7.3f\n",
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236 symbol_no,
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237 constel->re,
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238 constel->im,
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239 target->re,
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240 target->im,
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241 symbol,
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242 fpower,
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243 smooth_power,
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244 v17_rx_carrier_frequency(rx),
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245 v17_rx_signal_power(rx));
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246 printf("Carrier %d %f %f\n", symbol_no, v17_rx_carrier_frequency(rx), v17_rx_symbol_timing_correction(rx));
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247 symbol_no++;
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248 if (--update_interval <= 0)
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249 {
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250 len = v17_rx_equalizer_state(rx, &coeffs);
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251 printf("Equalizer A:\n");
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252 for (i = 0; i < len; i++)
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253 printf("%3d (%15.5f, %15.5f) -> %15.5f\n", i, coeffs[i].re, coeffs[i].im, powerf(&coeffs[i]));
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254 #if defined(ENABLE_GUI)
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255 if (use_gui)
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256 qam_monitor_update_equalizer(qam_monitor, coeffs, len);
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257 #endif
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258 update_interval = 100;
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259 }
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260 }
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261 }
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262 /*- End of function --------------------------------------------------------*/
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263
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264 int main(int argc, char *argv[])
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265 {
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266 v17_rx_state_t rx;
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267 v17_tx_state_t tx;
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268 bert_results_t bert_results;
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269 int16_t gen_amp[BLOCK_LEN];
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270 int16_t amp[BLOCK_LEN];
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271 AFfilehandle inhandle;
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272 AFfilehandle outhandle;
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273 AFfilesetup filesetup;
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274 int outframes;
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275 int samples;
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276 int i;
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277 int tep;
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278 int block_no;
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279 int noise_level;
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280 int signal_level;
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281 int bits_per_test;
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282 int line_model_no;
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283 int log_audio;
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284 int channel_codec;
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285
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286 channel_codec = MUNGE_CODEC_NONE;
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287 test_bps = 14400;
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288 tep = FALSE;
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289 line_model_no = 0;
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290 decode_test_file = NULL;
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291 noise_level = -70;
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292 signal_level = -13;
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293 bits_per_test = 50000;
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294 log_audio = FALSE;
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295 for (i = 1; i < argc; i++)
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296 {
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297 if (strcmp(argv[i], "-b") == 0)
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298 {
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299 bits_per_test = atoi(argv[++i]);
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300 continue;
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301 }
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302 if (strcmp(argv[i], "-c") == 0)
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303 {
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304 channel_codec = atoi(argv[++i]);
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305 continue;
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306 }
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307 if (strcmp(argv[i], "-d") == 0)
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308 {
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309 decode_test_file = argv[++i];
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310 continue;
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311 }
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312 if (strcmp(argv[i], "-t") == 0)
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313 {
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314 tep = TRUE;
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315 continue;
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316 }
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317 if (strcmp(argv[i], "-g") == 0)
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318 {
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319 use_gui = TRUE;
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320 continue;
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321 }
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322 if (strcmp(argv[i], "-l") == 0)
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323 {
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324 log_audio = TRUE;
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325 continue;
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326 }
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327 if (strcmp(argv[i], "-m") == 0)
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328 {
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329 line_model_no = atoi(argv[++i]);
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330 continue;
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331 }
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332 if (strcmp(argv[i], "-n") == 0)
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333 {
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334 noise_level = atoi(argv[++i]);
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335 continue;
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336 }
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337 if (strcmp(argv[i], "-s") == 0)
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338 {
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339 signal_level = atoi(argv[++i]);
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340 continue;
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341 }
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342 if (strcmp(argv[i], "14400") == 0)
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343 test_bps = 14400;
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344 else if (strcmp(argv[i], "12000") == 0)
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345 test_bps = 12000;
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346 else if (strcmp(argv[i], "9600") == 0)
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347 test_bps = 9600;
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348 else if (strcmp(argv[i], "7200") == 0)
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349 test_bps = 7200;
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350 else
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351 {
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352 fprintf(stderr, "Invalid bit rate\n");
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353 exit(2);
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354 }
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355 }
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356 inhandle = NULL;
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357 outhandle = NULL;
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358
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359 filesetup = AF_NULL_FILESETUP;
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360 if (log_audio)
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361 {
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362 if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
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363 {
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364 fprintf(stderr, " Failed to create file setup\n");
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365 exit(2);
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366 }
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367 afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
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368 afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
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369 afInitFileFormat(filesetup, AF_FILE_WAVE);
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370 afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
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371 if ((outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup)) == AF_NULL_FILEHANDLE)
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372 {
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373 fprintf(stderr, " Cannot create wave file '%s'\n", OUT_FILE_NAME);
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374 exit(2);
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375 }
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376 }
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377
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378 if (decode_test_file)
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379 {
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380 /* We will decode the audio from a wave file. */
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381 if ((inhandle = afOpenFile(decode_test_file, "r", NULL)) == AF_NULL_FILEHANDLE)
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382 {
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383 fprintf(stderr, " Cannot open wave file '%s'\n", decode_test_file);
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384 exit(2);
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385 }
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386 }
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387 else
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388 {
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389 /* We will generate V.17 audio, and add some noise to it. */
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390 v17_tx_init(&tx, test_bps, tep, v17getbit, NULL);
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391 v17_tx_power(&tx, signal_level);
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392 /* Move the carrier off a bit */
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393 tx.carrier_phase_rate = dds_phase_ratef(1792.0);
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394 tx.carrier_phase = 0x40000000;
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395
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396 bert_init(&bert, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
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397 bert_set_report(&bert, 10000, reporter, NULL);
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398
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399 if ((line_model = one_way_line_model_init(line_model_no, (float) noise_level, channel_codec)) == NULL)
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400 {
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401 fprintf(stderr, " Failed to create line model\n");
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402 exit(2);
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403 }
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404 }
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405
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406 v17_rx_init(&rx, test_bps, v17putbit, &rx);
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407 v17_rx_set_qam_report_handler(&rx, qam_report, (void *) &rx);
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408 span_log_set_level(&rx.logging, SPAN_LOG_SHOW_SEVERITY | SPAN_LOG_SHOW_PROTOCOL | SPAN_LOG_FLOW);
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409 span_log_set_tag(&rx.logging, "V.17 rx");
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410
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411 #if defined(ENABLE_GUI)
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412 if (use_gui)
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413 {
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414 qam_monitor = qam_monitor_init(10.0, NULL);
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415 if (!decode_test_file)
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416 {
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417 start_line_model_monitor(129);
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418 line_model_monitor_line_model_update(line_model->near_filter, line_model->near_filter_len);
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419 }
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420 }
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421 #endif
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422
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423 memset(&latest_results, 0, sizeof(latest_results));
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424 for (block_no = 0; block_no < 100000000; block_no++)
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425 {
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426 if (decode_test_file)
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427 {
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428 samples = afReadFrames(inhandle,
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429 AF_DEFAULT_TRACK,
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430 amp,
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431 BLOCK_LEN);
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432 if (samples == 0)
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433 break;
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434 #if defined(ENABLE_GUI)
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435 if (use_gui)
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436 qam_monitor_update_audio_level(qam_monitor, amp, samples);
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437 #endif
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438 }
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439 else
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440 {
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441 samples = v17_tx(&tx, gen_amp, BLOCK_LEN);
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442 #if defined(ENABLE_GUI)
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443 if (use_gui)
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444 qam_monitor_update_audio_level(qam_monitor, gen_amp, samples);
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445 #endif
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446 if (samples == 0)
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447 {
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448 printf("Restarting on zero output\n");
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449
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450 /* Push a little silence through, to ensure all the data bits get out of the buffers */
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451 memset(amp, 0, BLOCK_LEN*sizeof(int16_t));
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452 v17_rx(&rx, amp, BLOCK_LEN);
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453
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454 /* Note that we might get a few bad bits as the carrier shuts down. */
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455 bert_result(&bert, &bert_results);
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456 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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457 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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458 /* 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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459 should be error free, though the final report will generally contain bits errors as the carrier was dying. The total
|
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460 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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461 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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462 bits we sent. */
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463 #if 0
|
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464 if (bert_results.total_bits < bits_per_test
|
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465 ||
|
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466 latest_results.total_bits < bits_per_test - 100
|
|
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467 ||
|
|
|
468 latest_results.bad_bits != 0)
|
|
|
469 {
|
|
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470 break;
|
|
|
471 }
|
|
|
472 #endif
|
|
|
473 memset(&latest_results, 0, sizeof(latest_results));
|
|
|
474 v17_tx_restart(&tx, test_bps, tep, TRUE);
|
|
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475 v17_tx_power(&tx, signal_level);
|
|
|
476 v17_rx_restart(&rx, test_bps, TRUE);
|
|
|
477 rx.eq_put_step = rand()%(192*10/3);
|
|
|
478 bert_init(&bert, bits_per_test, BERT_PATTERN_ITU_O152_11, test_bps, 20);
|
|
|
479 bert_set_report(&bert, 10000, reporter, NULL);
|
|
|
480 }
|
|
|
481 if (log_audio)
|
|
|
482 {
|
|
|
483 outframes = afWriteFrames(outhandle,
|
|
|
484 AF_DEFAULT_TRACK,
|
|
|
485 gen_amp,
|
|
|
486 samples);
|
|
|
487 if (outframes != samples)
|
|
|
488 {
|
|
|
489 fprintf(stderr, " Error writing wave file\n");
|
|
|
490 exit(2);
|
|
|
491 }
|
|
|
492 }
|
|
|
493 one_way_line_model(line_model, amp, gen_amp, samples);
|
|
|
494 }
|
|
|
495 #if defined(ENABLE_GUI)
|
|
|
496 if (use_gui && !decode_test_file)
|
|
|
497 line_model_monitor_line_spectrum_update(amp, samples);
|
|
|
498 #endif
|
|
|
499 v17_rx(&rx, amp, samples);
|
|
|
500 }
|
|
|
501 if (decode_test_file)
|
|
|
502 {
|
|
|
503 #if defined(ENABLE_GUI)
|
|
|
504 if (use_gui)
|
|
|
505 qam_wait_to_end(qam_monitor);
|
|
|
506 #endif
|
|
|
507 }
|
|
|
508 else
|
|
|
509 {
|
|
|
510 bert_result(&bert, &bert_results);
|
|
|
511 fprintf(stderr, "At completion:\n");
|
|
|
512 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);
|
|
|
513 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);
|
|
|
514 one_way_line_model_release(line_model);
|
|
|
515 }
|
|
|
516 if (log_audio)
|
|
|
517 {
|
|
|
518 if (afCloseFile(outhandle))
|
|
|
519 {
|
|
|
520 fprintf(stderr, " Cannot close wave file '%s'\n", OUT_FILE_NAME);
|
|
|
521 exit(2);
|
|
|
522 }
|
|
|
523 afFreeFileSetup(filesetup);
|
|
|
524 }
|
|
|
525 return 0;
|
|
|
526 }
|
|
|
527 /*- End of function --------------------------------------------------------*/
|
|
|
528 /*- End of file ------------------------------------------------------------*/
|
