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1 #include "wm.h"
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2 #include "signature.h"
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3
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4 char *progname;
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5
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6 void usage(void) {
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7 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F file] [-l n] [-n n] [-o file] [-s file] [-S n] [-v n] file\n\n", progname);
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8 fprintf(stderr, "\t-a n\t\tembedding strength (default 0.5)\n");
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9 fprintf(stderr, "\t-e n\t\twavelet filtering method (default 2)\n");
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10 fprintf(stderr, "\t-f n\t\tfilter number (default 1)\n");
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11 fprintf(stderr, "\t-F file\t\tfilter definition file (default 'filter.dat')\n");
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12 fprintf(stderr, "\t-h\t\tprint usage\n");
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13 fprintf(stderr, "\t-l n\t\tembedding level (default 5)\n");
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14 fprintf(stderr, "\t-n n\t\twatermark bit length\n");
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15 fprintf(stderr, "\t-o file\t\toutput file\n");
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16 fprintf(stderr, "\t-s file\t\tuse signature file's embedding information\n");
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17 fprintf(stderr, "\t-S n\t\tseed\n");
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18 fprintf(stderr, "\t-v n\t\tverbosity level\n");
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19 exit(0);
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20 }
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21
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22 int main(int argc, char *argv[]) {
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23 FILE *in = stdin;
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24 FILE *out = stdout;
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25 FILE *sig = NULL;
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26
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27 char output_name[MAXPATHLEN] = "(stdout)";
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28 char input_name[MAXPATHLEN] = "(stdin)";
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29 char signature_name[MAXPATHLEN];
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30
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31 int verbose = 0;
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32 int c;
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33 int i;
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34 double a = 0.5;
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35 int l = 5;
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36 int n = 0, nb;
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37 int s = 0;
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38 int e = 2;
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39 int f = 1;
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40 char F[MAXPATHLEN] = "filter.dat";
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41
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42 progname = argv[0];
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43 wm_init();
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44
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45 while ((c = getopt(argc, argv, "a:e:f:F:h?l:n:o:s:S:v:")) != EOF) {
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46 switch (c) {
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47 case 'a':
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48 a = atof(optarg);
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49 if (a <= 0.0) {
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50 fprintf(stderr, "%s: embedding strength %f out of range\n", progname, a);
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51 exit(1);
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52 }
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53 break;
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54 case 'e':
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55 e = atoi(optarg);
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56 if (e < 0) {
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57 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e);
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58 }
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59 break;
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60 case 'f':
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61 f = atoi(optarg);
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62 if (f <= 0) {
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63 fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
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64 exit(1);
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65 }
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66 break;
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67 case 'F':
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68 strcpy(F, optarg);
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69 break;
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70 case 'h':
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71 case '?':
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72 usage();
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73 break;
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74 case 'l':
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75 l = atoi(optarg);
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76 if (l < 1) {
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77 fprintf(stderr, "%s: embedding level out of range\n", progname);
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78 exit(1);
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79 }
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80 break;
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81 case 'n':
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82 n = atoi(optarg);
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83 if (n < 1 || n > 1000) {
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84 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
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85 exit(1);
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86 }
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87 break;
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88 case 'o':
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89 if ((out = fopen(optarg, "wb")) == NULL) {
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90 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
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91 exit(1);
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92 }
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93 strcpy(output_name, optarg);
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94 break;
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95 case 's':
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96 if ((sig = fopen(optarg, "r")) == NULL) {
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97 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
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98 exit(1);
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99 }
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100 strcpy(signature_name, optarg);
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101 break;
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102 case 'S':
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103 s = atoi(optarg);
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104 break;
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105 case 'v':
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106 verbose = atoi(optarg);
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107 if (verbose < 0) {
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108 fprintf(stderr, "%s: verbosity level %d out of range", progname, verbose);
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109 exit(1);
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110 }
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111 break;
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112 }
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113 }
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114
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115 argc -= optind;
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116 argv += optind;
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117
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118 if (argc > 1) {
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119 usage();
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120 exit(1);
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121 }
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122
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123 if (argc == 1 && *argv[0] != '-')
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124 if ((in = fopen(argv[0], "rb")) == NULL) {
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125 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
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126 exit(1);
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127 }
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128 else
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129 strcpy(input_name, argv[0]);
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130
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131 if (sig) {
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132 char line[32];
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133 fgets(line, sizeof(line), sig);
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134 if (strspn(line, "XESG") >= 4) {
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135 if (n == 0)
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136 fscanf(sig, "%d\n", &n);
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137 else
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138 fscanf(sig, "%*d\n");
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139 if (a == 0.0)
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140 fscanf(sig, "%lf\n", &a);
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141 else
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142 fscanf(sig, "%*lf\n");
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143 if (e < 0)
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144 fscanf(sig, "%d\n", &e);
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145 else
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146 fscanf(sig, "%*d\n");
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147 if (f == 0)
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148 fscanf(sig, "%d\n", &f);
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149 else
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150 fscanf(sig, "%*d\n");
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151 if (!strcmp(F, ""))
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152 fscanf(sig, "%[^\n\r]\n", &F);
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153 else
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154 fscanf(sig, "%*[^\n\r]\n");
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155 if (l == 0)
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156 fscanf(sig, "%d\n", &l);
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157 else
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158 fscanf(sig, "%*d\n");
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159 }
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160 else {
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161 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
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162 exit(1);
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163 }
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164 close(sig);
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165 }
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166
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167 if (s)
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168 srandom(s);
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169 else
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170 srandom(time(NULL) * getpid());
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171
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172 if (n > 0) {
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173 nb = fread(signature, sizeof(char), i = NBITSTOBYTES(n), in);
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174 if (nb < i) {
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175 fprintf(stderr, "%s: failed to read all %d signature bits from %s\n", progname, n, input_name);
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176 exit(1);
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177 }
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178 }
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179 else {
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180 if (fscanf(in, "%128[^\n\r]", signature) == EOF) {
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181 fprintf(stderr, "%s: failed to read signature bits from %s\n", progname, input_name);
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182 exit(1);
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183 }
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184 nb = strlen(signature);
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185 n = NBYTESTOBITS(nb);
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186 fprintf(stderr, "%s: got %d signature bits\n", progname, n);
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187 }
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188
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189 fprintf(out, "XESG\n");
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190 fprintf(out, "%d\n", n);
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191 fprintf(out, "%f\n", a);
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192 fprintf(out, "%d\n", e);
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193 fprintf(out, "%d\n", f);
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194 fprintf(out, "%s\n", F);
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195 fprintf(out, "%d\n", l);
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196 fprintf(out, "%d\n", random());
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197 fwrite(signature, sizeof(char), nb, out);
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198 fprintf(out, "\n");
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199
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200 fclose(out);
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201
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202 exit(0);
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203 }
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