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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 * makecss.c - Create the composite source signal (CSS) for G.168 testing.
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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: make_g168_css.c,v 1.9 2006/11/19 14:07:27 steveu Exp $
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26 */
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27
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28 /*! \page makecss_page CSS construction for G.168 testing
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29 \section makecss_page_sec_1 What does it do?
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30 ???.
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31
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32 \section makecss_page_sec_2 How does it work?
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33 ???.
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34 */
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35
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36 #ifdef HAVE_CONFIG_H
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37 #include "config.h"
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38 #endif
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39
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40 #include <stdlib.h>
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41 #include <unistd.h>
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42 #include <inttypes.h>
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43 #include <string.h>
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44 #include <time.h>
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45 #include <stdio.h>
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46 #include <fcntl.h>
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47 #include <audiofile.h>
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48 #include <tiffio.h>
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49 #if defined(HAVE_FFTW3_H)
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50 #include <fftw3.h>
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51 #else
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52 #include <fftw.h>
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53 #endif
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54 #if defined(HAVE_TGMATH_H)
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55 #include <tgmath.h>
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56 #endif
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57 #if defined(HAVE_MATH_H)
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58 #define GEN_CONST
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59 #include <math.h>
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60 #endif
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61
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62 #include "spandsp.h"
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63 #include "spandsp/g168models.h"
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64
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65 #if !defined(NULL)
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66 #define NULL (void *) 0
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67 #endif
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68
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69 #define FAST_SAMPLE_RATE 44100.0
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70
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71 static double scaling(double f, double start, double end, double start_gain, double end_gain)
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72 {
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73 double scale;
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74
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75 scale = start_gain + (f - start)*(end_gain - start_gain)/(end - start);
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76 return scale;
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77 }
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78
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79 int main(int argc, char *argv[])
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80 {
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81 #if defined(HAVE_FFTW3_H)
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82 double in[8192][2];
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83 double out[8192][2];
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84 #else
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85 fftw_complex in[8192];
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86 fftw_complex out[8192];
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87 #endif
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88 fftw_plan p;
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89 int16_t voiced_sound[8192];
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90 int16_t noise_sound[8192];
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91 int16_t silence_sound[8192];
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92 int i;
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93 int j;
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94 int outframes;
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95 int voiced_length;
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96 float f;
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97 double peak;
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98 double ms;
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99 double scale;
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100 AFfilehandle filehandle;
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101 AFfilesetup filesetup;
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102 awgn_state_t noise_source;
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103
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104 filesetup = afNewFileSetup();
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105 if (filesetup == AF_NULL_FILESETUP)
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106 {
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107 fprintf(stderr, " Failed to create file setup\n");
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108 exit(2);
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109 }
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110 afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
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111 afInitRate(filesetup, AF_DEFAULT_TRACK, FAST_SAMPLE_RATE);
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112 afInitFileFormat(filesetup, AF_FILE_WAVE);
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113 afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
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114 filehandle = afOpenFile("sound_c1.wav", "w", filesetup);
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115 if (filehandle == AF_NULL_FILEHANDLE)
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116 {
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117 fprintf(stderr, " Failed to open result file\n");
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118 exit(2);
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119 }
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120
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121 for (i = 0; i < (int)(sizeof(css_c1)/sizeof(css_c1[0])); i++)
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122 voiced_sound[i] = css_c1[i];
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123 voiced_length = i;
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124
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125 ms = 0;
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126 peak = 0;
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127 for (i = 0; i < voiced_length; i++)
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128 {
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129 if (abs(voiced_sound[i]) > peak)
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130 peak = abs(voiced_sound[i]);
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131 ms += voiced_sound[i]*voiced_sound[i];
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132 }
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133 ms = 20.0*log10(sqrt(ms/voiced_length)/32767.0) + DBM0_MAX_POWER;
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134 printf("Voiced level = %.2fdB\n", ms);
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135
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136 #if defined(HAVE_FFTW3_H)
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137 p = fftw_plan_dft_1d(8192, in, out, FFTW_BACKWARD, FFTW_ESTIMATE);
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138 #else
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139 p = fftw_create_plan(8192, FFTW_BACKWARD, FFTW_ESTIMATE);
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140 #endif
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141 for (i = 0; i < 8192; i++)
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142 {
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143 #if defined(HAVE_FFTW3_H)
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144 in[i][0] = 0.0;
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145 in[i][1] = 0.0;
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146 #else
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147 in[i].re = 0.0;
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148 in[i].im = 0.0;
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149 #endif
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150 }
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151 for (i = 1; i <= 3715; i++)
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152 {
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153 f = FAST_SAMPLE_RATE*i/8192.0;
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154
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155 #if 1
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156 if (f < 50.0)
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157 scale = -60.0;
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158 else if (f < 100.0)
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159 scale = scaling(f, 50.0, 100.0, -25.8, -12.8);
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160 else if (f < 200.0)
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161 scale = scaling(f, 100.0, 200.0, -12.8, 17.4);
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162 else if (f < 215.0)
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163 scale = scaling(f, 200.0, 215.0, 17.4, 17.8);
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164 else if (f < 500.0)
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165 scale = scaling(f, 215.0, 500.0, 17.8, 12.2);
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166 else if (f < 1000.0)
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167 scale = scaling(f, 500.0, 1000.0, 12.2, 7.2);
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168 else if (f < 2850.0)
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169 scale = scaling(f, 1000.0, 2850.0, 7.2, 0.0);
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170 else if (f < 3600.0)
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171 scale = scaling(f, 2850.0, 3600.0, 0.0, -2.0);
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172 else if (f < 3660.0)
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173 scale = scaling(f, 3600.0, 3660.0, -2.0, -20.0);
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174 else if (f < 3680.0)
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175 scale = scaling(f, 3600.0, 3680.0, -20.0, -30.0);
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176 else
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177 scale = -60.0;
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178 #else
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179 scale = 0.0;
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180 #endif
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181 #if defined(HAVE_FFTW3_H)
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182 in[i][0] = 0.0;
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183 in[i][1] = (rand() & 0x1) ? 1.0 : -1.0;
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184 in[i][1] *= pow(10.0, scale/20.0);
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185 in[i][1] *= 35.0; //305360
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186 //printf("%10d %15.5f %15.5f\n", i, in[i].re, in[i].im);
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187 in[8192 - i][0] = 0.0;
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188 in[8192 - i][1] = -in[i][1];
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189 //printf("%10d %15.5f %15.5f\n", i, in[i][0], in[i][1]);
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190 #else
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191 in[i].re = 0.0;
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192 in[i].im = (rand() & 0x1) ? 1.0 : -1.0;
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193 in[i].im *= pow(10.0, scale/20.0);
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194 in[i].im *= 35.0; //305360
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195 in[8192 - i].re = 0.0;
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196 in[8192 - i].im = -in[i].im;
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197 //printf("%10d %15.5f %15.5f\n", i, in[i].re, in[i].im);
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198 #endif
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199 }
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200 #if defined(HAVE_FFTW3_H)
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201 fftw_execute(p);
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202 #else
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203 fftw_one(p, in, out);
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204 #endif
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205 for (i = 0; i < 8192; i++)
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206 {
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207 //printf("%10d %15.5f %15.5f\n", i, out[i].re, out[i].im);
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208 #if defined(HAVE_FFTW3_H)
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209 noise_sound[i] = out[i][0];
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210 #else
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211 noise_sound[i] = out[i].re;
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212 #endif
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213 }
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214
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215 peak = 0;
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216 ms = 0;
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217 for (i = 0; i < 8192; i++)
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218 {
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219 if (abs(noise_sound[i]) > peak)
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220 peak = abs(noise_sound[i]);
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221 ms += noise_sound[i]*noise_sound[i];
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222 }
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223 printf("Noise level = %.2fdB\n", 20.0*log10(sqrt(ms/8192.0)/32767.0) + DBM0_MAX_POWER);
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224 printf("Crest factor = %.2fdB\n", 20.0*log10(peak/sqrt(ms/8192.0)));
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225
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226 for (i = 0; i < 8192; i++)
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227 silence_sound[i] = 0.0;
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228
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229 for (j = 0; j < 16; j++)
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230 {
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231 outframes = afWriteFrames(filehandle,
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232 AF_DEFAULT_TRACK,
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233 voiced_sound,
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234 voiced_length);
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235 }
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236 printf("%d samples of voice\n", 16*voiced_length);
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237 outframes = afWriteFrames(filehandle,
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238 AF_DEFAULT_TRACK,
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239 noise_sound,
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240 8192);
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241 outframes = afWriteFrames(filehandle,
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242 AF_DEFAULT_TRACK,
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243 noise_sound,
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244 8820 - 8192);
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245 printf("%d samples of noise\n", 8820);
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246 outframes = afWriteFrames(filehandle,
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247 AF_DEFAULT_TRACK,
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248 silence_sound,
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249 4471);
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250 printf("%d samples of silence\n", 4471);
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251
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252 for (j = 0; j < voiced_length; j++)
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253 voiced_sound[j] = -voiced_sound[j];
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254 for (j = 0; j < 8192; j++)
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255 noise_sound[j] = -noise_sound[j];
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256
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257 for (j = 0; j < 16; j++)
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258 {
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259 outframes = afWriteFrames(filehandle,
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260 AF_DEFAULT_TRACK,
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261 voiced_sound,
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262 voiced_length);
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263 }
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264 printf("%d samples of voice\n", 16*voiced_length);
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265 outframes = afWriteFrames(filehandle,
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266 AF_DEFAULT_TRACK,
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267 noise_sound,
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268 8192);
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269 outframes = afWriteFrames(filehandle,
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270 AF_DEFAULT_TRACK,
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271 noise_sound,
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272 8820 - 8192);
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273 printf("%d samples of noise\n", 8820);
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274 outframes = afWriteFrames(filehandle,
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275 AF_DEFAULT_TRACK,
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276 silence_sound,
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277 4471);
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278 printf("%d samples of silence\n", 4471);
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279
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280 if (afCloseFile(filehandle) != 0)
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281 {
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282 fprintf(stderr, " Cannot close speech file '%s'\n", "sound_c1.wav");
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283 exit(2);
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284 }
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285
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286 afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
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287 afInitRate(filesetup, AF_DEFAULT_TRACK, FAST_SAMPLE_RATE);
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288 afInitFileFormat(filesetup, AF_FILE_WAVE);
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289 afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
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290 filehandle = afOpenFile("sound_c3.wav", "w", filesetup);
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291 if (filehandle == AF_NULL_FILEHANDLE)
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292 {
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293 fprintf(stderr, " Failed to open result file\n");
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294 exit(2);
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295 }
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296
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297 for (i = 0; i < (int) (sizeof(css_c3)/sizeof(css_c3[0])); i++)
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298 voiced_sound[i] = css_c3[i];
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299 voiced_length = i;
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300
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301 ms = 0;
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302 for (i = 0; i < voiced_length; i++)
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303 {
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304 if (abs(voiced_sound[i]) > peak)
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305 peak = abs(voiced_sound[i]);
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306 ms += voiced_sound[i]*voiced_sound[i];
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307 }
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308 ms = 20.0*log10(sqrt(ms/voiced_length)/32767.0) + DBM0_MAX_POWER;
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309 printf("Voiced level = %.2fdB\n", ms);
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310
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311 awgn_init_dbm0(&noise_source, 7162534, ms);
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312 for (i = 0; i < 8192; i++)
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313 noise_sound[i] = awgn(&noise_source);
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314 peak = 0;
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315 ms = 0;
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316 for (i = 0; i < 8192; i++)
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317 {
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318 if (abs(noise_sound[i]) > peak)
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319 peak = abs(noise_sound[i]);
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320 ms += noise_sound[i]*noise_sound[i];
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321 }
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322 printf("Noise level = %.2fdB\n", 20.0*log10(sqrt(ms/8192.0)/32767.0) + DBM0_MAX_POWER);
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323 printf("Crest factor = %.2fdB\n", 20.0*log10(peak/sqrt(ms/8192.0)));
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324
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325 for (j = 0; j < 14; j++)
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326 {
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327 outframes = afWriteFrames(filehandle,
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328 AF_DEFAULT_TRACK,
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329 voiced_sound,
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330 voiced_length);
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331 }
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332 printf("%d samples of voice\n", 14*i);
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333 outframes = afWriteFrames(filehandle,
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334 AF_DEFAULT_TRACK,
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335 noise_sound,
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336 8192);
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337 outframes = afWriteFrames(filehandle,
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338 AF_DEFAULT_TRACK,
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339 noise_sound,
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340 8820 - 8192);
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341 printf("%d samples of noise\n", 8820);
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342 outframes = afWriteFrames(filehandle,
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343 AF_DEFAULT_TRACK,
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344 silence_sound,
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345 5614);
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346 printf("%d samples of silence\n", 5614);
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347
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348 for (j = 0; j < voiced_length; j++)
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349 voiced_sound[j] = -voiced_sound[j];
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350 for (j = 0; j < 8192; j++)
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351 noise_sound[j] = -noise_sound[j];
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352
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353 for (j = 0; j < 14; j++)
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354 {
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355 outframes = afWriteFrames(filehandle,
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356 AF_DEFAULT_TRACK,
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357 voiced_sound,
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358 voiced_length);
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359 }
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360 printf("%d samples of voice\n", 14*i);
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361 outframes = afWriteFrames(filehandle,
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362 AF_DEFAULT_TRACK,
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363 noise_sound,
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364 8192);
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365 outframes = afWriteFrames(filehandle,
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366 AF_DEFAULT_TRACK,
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367 noise_sound,
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368 8820 - 8192);
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369 printf("%d samples of noise\n", 8820);
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370 outframes = afWriteFrames(filehandle,
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371 AF_DEFAULT_TRACK,
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372 silence_sound,
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373 5614);
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374 printf("%d samples of silence\n", 5614);
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375
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376 if (afCloseFile(filehandle) != 0)
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377 {
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378 fprintf(stderr, " Cannot close speech file '%s'\n", "sound_c3.wav");
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379 exit(2);
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380 }
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381 afFreeFileSetup(filesetup);
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382
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383 fftw_destroy_plan(p);
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384 return 0;
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385 }
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386 /*- End of function --------------------------------------------------------*/
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387 /*- End of file ------------------------------------------------------------*/
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