1 | //roarsin.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2012 |
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5 | * |
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6 | * This file is part of roarclients a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * RoarAudio is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | */ |
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25 | |
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26 | #include <roaraudio.h> /* libroar */ |
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27 | |
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28 | #ifdef ROAR_HAVE_LIBM |
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29 | |
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30 | #include <math.h> /* sin() */ |
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31 | #include <stdio.h> /* *printf*() */ |
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32 | |
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33 | double rect (double x) { |
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34 | x /= 2*M_PI; |
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35 | x -= (int)x; |
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36 | |
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37 | if ( x < 0.5 ) |
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38 | return 1; |
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39 | else |
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40 | return -1; |
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41 | } |
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42 | |
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43 | double saw (double x) { |
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44 | x /= 2*M_PI; |
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45 | x -= (int)x; |
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46 | |
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47 | return 2*x - 1; |
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48 | } |
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49 | |
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50 | double tri (double x) { |
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51 | x /= 2*M_PI; |
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52 | x -= (int)x; |
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53 | |
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54 | if ( x < 0.5 ) |
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55 | return 4* x - 1; |
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56 | else |
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57 | return -4*(x-0.5) + 1; |
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58 | } |
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59 | |
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60 | double trap (double x) { |
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61 | x /= 2*M_PI; |
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62 | x -= (int)x; |
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63 | |
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64 | if ( x < 0.125 || x > 0.875 ) { |
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65 | return -1; |
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66 | } else if ( x < 0.625 && x > 0.375 ) { |
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67 | return 1; |
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68 | } else if ( x < 0.5 ) { |
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69 | return 8*(x-0.375) + 1; |
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70 | } else { |
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71 | return -8*(x-0.625) + 1; |
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72 | } |
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73 | } |
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74 | |
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75 | static void usage(const char * progname) { |
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76 | fprintf(stderr, "Usage: %s [OPTIONS] [FUNCTION]\n", progname); |
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77 | |
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78 | fprintf(stderr, "\nOptions:\n\n"); |
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79 | fprintf(stderr, |
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80 | " --help - Show this help\n" |
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81 | " --server SERVER - Set server address\n" |
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82 | " --rate -R RATE - Set sample rate to use\n" |
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83 | " --freq FREQ - Set frequency (in Hz)\n" |
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84 | " --time TIME - Set time (in sec)\n" |
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85 | " --volume VOL - Set volume\n" |
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86 | ); |
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87 | |
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88 | fprintf(stderr, "\nFunctions:\n\n"); |
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89 | fprintf(stderr, |
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90 | " --sin - Use Sinus\n" |
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91 | " --rect - Use Rectangle\n" |
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92 | " --saw - Use Saw\n" |
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93 | " --tri - Use Triangle\n" |
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94 | " --trap - Use Trap\n" |
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95 | ); |
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96 | } |
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97 | |
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98 | int main (int argc, char * argv[]) { |
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99 | const char * server = NULL; |
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100 | int rate = ROAR_RATE_DEFAULT; |
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101 | float freq = 523.2; /* middle C */ |
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102 | float t = 0; /* current time */ |
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103 | float tcalc = 0; /* current time for calculation */ |
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104 | float length = 5; /* 5 sec */ |
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105 | float step; /* how much time per sample we have to encode ... */ |
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106 | roar_vs_t * vss; |
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107 | int err; |
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108 | int i; |
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109 | int16_t out[1024]; |
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110 | double (*func)(double x) = sin; |
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111 | double volume = 1; |
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112 | |
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113 | for (i = 1; i < argc; i++) { |
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114 | if ( !strcmp(argv[i], "--freq") ) { |
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115 | freq = atof(argv[++i]); |
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116 | } else if ( !strcmp(argv[i], "--time") ) { |
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117 | length = atof(argv[++i]); |
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118 | } else if ( !strcmp(argv[i], "--server") ) { |
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119 | server = argv[++i]; |
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120 | } else if ( !strcmp(argv[i], "--rate") || !strcmp(argv[i], "-R") ) { |
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121 | rate = roar_str2rate(argv[++i]); |
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122 | } else if ( !strcmp(argv[i], "--volume") ) { |
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123 | volume = atof(argv[++i]); |
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124 | } else if ( !strcmp(argv[i], "--sin") ) { |
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125 | func = sin; |
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126 | } else if ( !strcmp(argv[i], "--rect") ) { |
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127 | func = rect; |
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128 | } else if ( !strcmp(argv[i], "--saw") ) { |
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129 | func = saw; |
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130 | } else if ( !strcmp(argv[i], "--tri") ) { |
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131 | func = tri; |
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132 | } else if ( !strcmp(argv[i], "--trap") ) { |
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133 | func = trap; |
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134 | } else if ( !strcmp(argv[i], "--help") ) { |
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135 | usage(argv[0]); |
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136 | return 0; |
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137 | } else { |
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138 | usage(argv[0]); |
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139 | return 2; |
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140 | } |
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141 | } |
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142 | |
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143 | step = M_PI*2*freq/rate; |
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144 | |
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145 | if ( (vss = roar_vs_new_playback(server, "sine gen", rate, 1, ROAR_CODEC_DEFAULT, 16, &err)) == NULL ) { |
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146 | fprintf(stderr, "Error: can not open playback: %s\n", roar_vs_strerr(err)); |
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147 | exit(1); |
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148 | } |
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149 | |
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150 | if ( roar_vs_volume_mono(vss, volume, NULL) == 0 ) { |
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151 | // If setting server volume successed set local volume to one. |
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152 | volume = 1; |
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153 | } |
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154 | |
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155 | while (t < 2*M_PI*freq*length) { |
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156 | for (i = 0; i < 1024; i++) { |
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157 | out[i] = 32767.*volume*func(tcalc); |
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158 | t += step; |
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159 | tcalc += step; |
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160 | } |
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161 | if ( roar_vs_write(vss, out, 2048, &err) != (ssize_t)2048 ) { |
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162 | fprintf(stderr, "Error: can not write data: %s\n", roar_vs_strerr(err)); |
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163 | break; |
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164 | } |
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165 | |
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166 | // this code enables us to generate the same signal for a long periode of time |
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167 | // without loosing accuracy of the float type. |
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168 | while (tcalc > 2*M_PI) |
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169 | tcalc -= 2*M_PI; |
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170 | } |
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171 | |
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172 | roar_vs_close(vss, ROAR_VS_FALSE, NULL); |
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173 | |
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174 | return 0; |
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175 | } |
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176 | |
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177 | #else |
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178 | int main (void) { |
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179 | fprintf(stderr, "Error: No Math library support compiled in.\n"); |
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180 | return 1; |
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181 | } |
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182 | #endif |
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183 | |
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184 | //ll |
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