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0
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1 #include "wm.h"
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2 #include "signature.h"
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3 #include "bruyn_common.h"
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4
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5 char *progname;
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6
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7 void usage(void) {
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8 fprintf(stderr, "usage: %s [-b n] [-k] [-n n] [-o file] [-pP n] [-q n] [-s file] [-S n] [-tT n] file\n\n", progname);
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9 fprintf(stderr, "\t-b n\t\tblock size (default 8)\n");
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10 fprintf(stderr, "\t-h\t\tprint usage\n");
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11 fprintf(stderr, "\t-k\t\tdisable block skipping\n");
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12 fprintf(stderr, "\t-n n\t\twatermark bit length\n");
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13 fprintf(stderr, "\t-o file\t\toutput file\n");
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14 fprintf(stderr, "\t-p n\t\tpattern type for zone 1 (default 1, 1.." NPATTERN_USAGE ")\n");
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15 fprintf(stderr, "\t-P n\t\tpattern type for zone 2 (default 2, 1.." NPATTERN_USAGE ")\n");
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16 fprintf(stderr, "\t-q n\t\tsignature strength (default 7.0)\n");
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17 fprintf(stderr, "\t-s file\t\tuse signature file's embedding information\n");
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18 fprintf(stderr, "\t-S n\t\tseed\n");
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19 fprintf(stderr, "\t-t n\t\tthreshold for noise (default " THRESHOLD_NOISE_USAGE ")\n");
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20 fprintf(stderr, "\t-T n\t\tthreshold for slope (default " THRESHOLD_SLOPE_USAGE ")\n");
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21 exit(0);
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22 }
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23
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24 int main(int argc, char *argv[]) {
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25 FILE *in = stdin;
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26 FILE *out = stdout;
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27 FILE *sig = NULL;
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28
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29 char output_name[MAXPATHLEN] = "(stdout)";
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30 char input_name[MAXPATHLEN] = "(stdin)";
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31 char signature_name[MAXPATHLEN];
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32
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33 int c;
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34 int i;
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35 int b = 8;
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36 int n = 0;
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37 int nb;
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38 int s = 0;
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39 int p1 = 1;
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40 int p2 = 2;
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41 double t1 = THRESHOLD_NOISE;
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42 double t2 = THRESHOLD_SLOPE;
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43 double q = 7.0;
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44 int skipping = 0;
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45
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46 progname = argv[0];
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47 wm_init();
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48
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49 while ((c = getopt(argc, argv, "b:h?n:o:p:P:q:s:S:t:T:k")) != EOF) {
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50 switch (c) {
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51 case 'b':
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52 b = atoi(optarg);
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53 if (b <= 0) {
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54 fprintf(stderr, "%s: block size %d out of range\n", progname, b);
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55 exit(1);
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56 }
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57 break;
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58 case 'k':
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59 skipping = 1;
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60 break;
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61 case 'h':
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62 case '?':
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63 usage();
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64 break;
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65 case 'n':
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66 n = atoi(optarg);
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67 if (n < 1 || n > 1000) {
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68 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
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69 exit(1);
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70 }
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71 break;
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72 case 'o':
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73 if ((out = fopen(optarg, "wb")) == NULL) {
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74 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
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75 exit(1);
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76 }
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77 strcpy(output_name, optarg);
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78 break;
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79 case 'p':
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80 p1 = atoi(optarg);
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81 if (p1 <= 0 || p1 > NPATTERN) {
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82 fprintf(stderr, "%s: pattern type out of range\n", progname);
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83 exit(1);
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84 }
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85 break;
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86 case 'P':
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87 p2 = atoi(optarg);
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88 if (p2 <= 0 || p2 > NPATTERN) {
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89 fprintf(stderr, "%s: pattern type out of range\n", progname);
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90 exit(1);
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91 }
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92 break;
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93 case 'q':
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94 q = atof(optarg);
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95 if (q <= 0.0) {
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96 fprintf(stderr, "%s: signature strength factor %f out of range\n", progname, q);
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97 exit(1);
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98 }
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99 break;
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100 case 't':
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101 t1 = atof(optarg);
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102 if (t1 <= 0) {
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103 fprintf(stderr, "%s: noise threshold %f out of range\n", progname, t1);
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104 }
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105 break;
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106 case 'T':
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107 t2 = atof(optarg);
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108 if (t2 <= 0) {
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109 fprintf(stderr, "%s: slope threshold %f out of range\n", progname, t2);
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110 }
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111 break;
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112 case 's':
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113 if ((sig = fopen(optarg, "r")) == NULL) {
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114 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
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115 exit(1);
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116 }
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117 strcpy(signature_name, optarg);
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118 break;
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119 case 'S':
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120 s = atoi(optarg);
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121 break;
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122 }
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123 }
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124
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125 argc -= optind;
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126 argv += optind;
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127
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128 if (argc > 1) {
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129 usage();
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130 exit(1);
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131 }
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132
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133 if (b % 2 > 0 || b <= 2) {
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8
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134 fprintf(stderr, "%s: block size has to be even and greater than 2\n", progname);
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0
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135 exit(1);
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136 }
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137
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8
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138 if (argc == 1 && *argv[0] != '-') {
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0
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139 if ((in = fopen(argv[0], "rb")) == NULL) {
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140 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
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141 exit(1);
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142 }
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143 else
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144 strcpy(input_name, argv[0]);
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8
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145 }
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0
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146
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147 // read signature file and set options
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148 // command line options override signature file options
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149 if (sig) {
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150 char line[128];
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151 fgets(line, sizeof(line), sig);
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152 if (strspn(line, "BRSG") >= 4) {
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153 if (n == 0)
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154 fscanf(sig, "%d\n", &n);
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155 else
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156 fscanf(sig, "%*d\n");
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157 if (skipping == 0)
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158 fscanf(sig, "%d\n", &skipping);
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159 else
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160 fscanf(sig, "%*d\n");
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161 if (p1 == 0)
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162 fscanf(sig, "%d\n", &p1);
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163 else
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164 fscanf(sig, "%*d\n");
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165 if (p2 == 0)
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166 fscanf(sig, "%d\n", &p2);
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167 else
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168 fscanf(sig, "%*d\n");
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169 if (q == 0.0)
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170 fscanf(sig, "%lf\n", &q);
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171 else
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172 fscanf(sig, "%*lf\n");
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173 if (t1 == 0.0)
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174 fscanf(sig, "%lf\n", &t1);
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175 else
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176 fscanf(sig, "%*lf\n");
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177 if (t2 == 0.0)
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178 fscanf(sig, "%lf\n", &t2);
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179 else
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180 fscanf(sig, "%*lf\n");
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181 if (b == 0)
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182 fscanf(sig, "%d\n", &b);
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183 else
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184 fscanf(sig, "%*d\n");
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185 }
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186 else {
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187 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
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188 exit(1);
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189 }
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190 fclose(sig);
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191 }
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192
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193 if (s)
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194 srandom(s);
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195 else
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196 srandom(time(NULL) * getpid());
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197
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198 if (n > 0) {
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199 nb = fread(signature, sizeof(char), i = NBITSTOBYTES(n), in);
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200 if (nb < i) {
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201 fprintf(stderr, "%s: failed to read all %d signature bits from %s\n", progname, n, input_name);
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202 exit(1);
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203 }
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204 }
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205 else {
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206 if (fscanf(in, "%128[^\n\r]", signature) == EOF) {
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207 fprintf(stderr, "%s: failed to read signature bits from %s\n", progname, input_name);
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208 exit(1);
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209 }
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210 nb = strlen(signature);
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211 n = NBYTESTOBITS(nb);
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212 fprintf(stderr, "%s: got %d signature bits\n", progname, n);
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213 }
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214
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215
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216 fprintf(out, "BRSG\n");
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217 fprintf(out, "%d\n", n);
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218 fprintf(out, "%d\n", skipping);
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219 fprintf(out, "%d\n", p1);
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220 fprintf(out, "%d\n", p2);
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221 fprintf(out, "%f\n", q);
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222 fprintf(out, "%f\n", t1);
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223 fprintf(out, "%f\n", t2);
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224 fprintf(out, "%d\n", b);
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8
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225 fprintf(out, "%ld\n", random());
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0
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226 fwrite(signature, sizeof(char), nb, out);
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227 fprintf(out, "\n");
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228
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229 fclose(out);
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230
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231 exit(0);
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232 }
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