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3
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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-q n\t\tquantization level\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-v n\t\tverbosity level\n");
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20 exit(0);
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21 }
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22
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23 int main(int argc, char *argv[]) {
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24 FILE *in = stdin;
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25 FILE *out = stdout;
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26 FILE *sig = NULL;
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27
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28 char output_name[MAXPATHLEN] = "(stdout)";
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29 char input_name[MAXPATHLEN] = "(stdin)";
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30 char signature_name[MAXPATHLEN];
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31
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32 int verbose = 0;
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33 int c;
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34 int i;
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35 double a = 0.5;
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36 int q = 4;
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37 int l = 5;
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38 int n = 0, nb;
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39 int s = 0;
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40 int e = 2;
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41 int f = 1;
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42 char F[MAXPATHLEN] = "filter.dat";
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43
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44 progname = argv[0];
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45 wm_init();
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46
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47 while ((c = getopt(argc, argv, "a:e:f:F:h?l:n:o:s:S:v:q:")) != EOF) {
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48 switch (c) {
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49 case 'a':
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50 a = atof(optarg);
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51 if (a <= 0.0) {
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52 fprintf(stderr, "%s: embedding strength %f out of range\n", progname, a);
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53 exit(1);
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54 }
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55 break;
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56 case 'e':
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57 e = atoi(optarg);
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58 if (e < 0) {
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59 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e);
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60 }
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61 break;
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62 case 'q':
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63 q = atoi(optarg);
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64 break;
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65 case 'f':
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66 f = atoi(optarg);
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67 if (f <= 0) {
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68 fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
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69 exit(1);
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70 }
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71 break;
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72 case 'F':
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73 strcpy(F, optarg);
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74 break;
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75 case 'h':
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76 case '?':
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77 usage();
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78 break;
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79 case 'l':
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80 l = atoi(optarg);
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81 if (l < 1) {
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82 fprintf(stderr, "%s: embedding level 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 'n':
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87 n = atoi(optarg);
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88 if (n < 1 || n > 1000) {
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89 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
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90 exit(1);
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91 }
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92 break;
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93 case 'o':
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94 if ((out = fopen(optarg, "wb")) == NULL) {
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95 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
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96 exit(1);
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97 }
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98 strcpy(output_name, optarg);
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99 break;
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100 case 's':
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101 if ((sig = fopen(optarg, "r")) == NULL) {
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102 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
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103 exit(1);
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104 }
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105 strcpy(signature_name, optarg);
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106 break;
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107 case 'S':
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108 s = atoi(optarg);
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109 break;
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110 case 'v':
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111 verbose = atoi(optarg);
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112 if (verbose < 0) {
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113 fprintf(stderr, "%s: verbosity level %d out of range", progname, verbose);
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114 exit(1);
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115 }
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116 break;
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117 }
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118 }
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119
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120 argc -= optind;
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121 argv += optind;
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122
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123 if (argc > 1) {
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124 usage();
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125 exit(1);
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126 }
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127
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8
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128 if (argc == 1 && *argv[0] != '-') {
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3
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129 if ((in = fopen(argv[0], "rb")) == NULL) {
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130 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
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131 exit(1);
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132 }
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133 else
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134 strcpy(input_name, argv[0]);
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8
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135 }
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136
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3
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137 if (sig) {
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138 char line[32];
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139 fgets(line, sizeof(line), sig);
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140 if (strspn(line, "XE2SG") >= 5) {
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141 if (n == 0)
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142 fscanf(sig, "%d\n", &n);
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143 else
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144 fscanf(sig, "%*d\n");
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145 if (a == 0.0)
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146 fscanf(sig, "%lf\n", &a);
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147 else
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148 fscanf(sig, "%*lf\n");
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149 if (e < 0)
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150 fscanf(sig, "%d\n", &e);
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151 else
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152 fscanf(sig, "%*d\n");
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153 if (f == 0)
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154 fscanf(sig, "%d\n", &f);
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155 else
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156 fscanf(sig, "%*d\n");
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157 if (!strcmp(F, ""))
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158 fscanf(sig, "%[^\n\r]\n", &F);
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159 else
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160 fscanf(sig, "%*[^\n\r]\n");
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161 if (q == 0)
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162 fscanf(sig, "%d\n", &q);
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163 else
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164 fscanf(sig, "%*d\n");
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165 if (l == 0)
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166 fscanf(sig, "%d\n", &l);
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167 else
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168 fscanf(sig, "%*d\n");
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169 }
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170 else {
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171 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
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172 exit(1);
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173 }
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8
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174 fclose(sig);
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3
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175 }
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176
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177 if (s)
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178 srandom(s);
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179 else
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180 srandom(time(NULL) * getpid());
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181
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182 if (n > 0) {
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183 nb = fread(signature, sizeof(char), i = NBITSTOBYTES(n), in);
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184 if (nb < i) {
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185 fprintf(stderr, "%s: failed to read all %d signature bits from %s\n", progname, n, input_name);
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186 exit(1);
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187 }
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188 }
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189 else {
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190 if (fscanf(in, "%128[^\n\r]", signature) == EOF) {
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191 fprintf(stderr, "%s: failed to read signature bits from %s\n", progname, input_name);
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192 exit(1);
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193 }
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194 nb = strlen(signature);
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195 n = NBYTESTOBITS(nb);
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196 fprintf(stderr, "%s: got %d signature bits\n", progname, n);
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197 }
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198
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199 fprintf(out, "XE2SG\n");
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200 fprintf(out, "%d\n", n);
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201 fprintf(out, "%f\n", a);
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202 fprintf(out, "%d\n", e);
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203 fprintf(out, "%d\n", f);
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204 fprintf(out, "%s\n", F);
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205 fprintf(out, "%d\n", q);
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206 fprintf(out, "%d\n", l);
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8
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207 fprintf(out, "%ld\n", random());
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3
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208 fwrite(signature, sizeof(char), nb, out);
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209 fprintf(out, "\n");
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210
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211 fclose(out);
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212
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213 exit(0);
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214 }
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