Mercurial > hg > wm
comparison Meerwald-dir/gen_kund_sig.c @ 24:9f20bce6184e v0.7
move directories, support netpbm 11
| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> |
|---|---|
| date | Fri, 20 Dec 2024 13:08:59 +0100 |
| parents | Meerwald/gen_kund_sig.c@acb6967ee76d |
| children |
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| 23:71dd4b96221b | 24:9f20bce6184e |
|---|---|
| 1 #include "wm.h" | |
| 2 #include "signature.h" | |
| 3 | |
| 4 char *progname; | |
| 5 | |
| 6 void usage(void) { | |
| 7 fprintf(stderr, "usage: %s [-e n] [-f n] [-F file] [-l n] [-n n] [-o file] [-q n] [-s n] file\n\n", progname); | |
| 8 fprintf(stderr, "\t-h\t\tprint usage\n"); | |
| 9 fprintf(stderr, "\t-e n\t\twavelet filtering method (default 2)\n"); | |
| 10 fprintf(stderr, "\t-f n\t\tfilter number (default 1)\n"); | |
| 11 fprintf(stderr, "\t-F file\t\tfilter definition file (default 'filter.dat')\n"); | |
| 12 fprintf(stderr, "\t-l n\t\tembedding level (default 1)\n"); | |
| 13 fprintf(stderr, "\t-n n\t\twatermark bit length\n"); | |
| 14 fprintf(stderr, "\t-o file\t\toutput file\n"); | |
| 15 fprintf(stderr, "\t-q n\t\tsignature strength (default 1.0)\n"); | |
| 16 fprintf(stderr, "\t-s n\t\tseed\n"); | |
| 17 exit(0); | |
| 18 } | |
| 19 | |
| 20 int main(int argc, char *argv[]) { | |
| 21 FILE *in = stdin; | |
| 22 FILE *out = stdout; | |
| 23 | |
| 24 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 25 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 26 | |
| 27 int c; | |
| 28 int i; | |
| 29 int l = 1; | |
| 30 int n = 0, nb; | |
| 31 int s = 0; | |
| 32 double q = 1.0; | |
| 33 int e = 2; | |
| 34 int f = 1; | |
| 35 char F[MAXPATHLEN] = "filter.dat"; | |
| 36 | |
| 37 progname = argv[0]; | |
| 38 | |
| 39 #ifdef __EMX__ | |
| 40 _fsetmode(in, "b"); | |
| 41 _fsetmode(out, "b"); | |
| 42 #endif | |
| 43 | |
| 44 while ((c = getopt(argc, argv, "e:f:F:h?l:n:o:q:s:")) != EOF) { | |
| 45 switch (c) { | |
| 46 case 'e': | |
| 47 e = atoi(optarg); | |
| 48 if (e < 0) { | |
| 49 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e); | |
| 50 } | |
| 51 break; | |
| 52 case 'f': | |
| 53 f = atoi(optarg); | |
| 54 if (f <= 0) { | |
| 55 fprintf(stderr, "%s: filter number %d out of range\n", progname, f); | |
| 56 exit(1); | |
| 57 } | |
| 58 break; | |
| 59 case 'F': | |
| 60 strcpy(F, optarg); | |
| 61 break; | |
| 62 case 'h': | |
| 63 case '?': | |
| 64 usage(); | |
| 65 break; | |
| 66 case 'l': | |
| 67 l = atoi(optarg); | |
| 68 if (l < 1) { | |
| 69 fprintf(stderr, "%s: embedding level out of range\n", progname); | |
| 70 exit(1); | |
| 71 } | |
| 72 break; | |
| 73 case 'n': | |
| 74 n = atoi(optarg); | |
| 75 if (n < 1 || n > 1000) { | |
| 76 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n); | |
| 77 exit(1); | |
| 78 } | |
| 79 if (n % 4 != 0 || (int) sqrt(n / 4) * (int) sqrt(n / 4) != n) { | |
| 80 fprintf(stderr, "%s: watermark length not divisible by 4 or not a square number\n", progname); | |
| 81 exit(1); | |
| 82 } | |
| 83 break; | |
| 84 case 'o': | |
| 85 if ((out = fopen(optarg, "wb")) == NULL) { | |
| 86 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 87 exit(1); | |
| 88 } | |
| 89 strcpy(output_name, optarg); | |
| 90 break; | |
| 91 case 'q': | |
| 92 q = atof(optarg); | |
| 93 if (q <= 0.0) { | |
| 94 fprintf(stderr, "%s: signature strength factor %f out of range\n", progname, q); | |
| 95 exit(1); | |
| 96 } | |
| 97 break; | |
| 98 case 's': | |
| 99 s = atoi(optarg); | |
| 100 break; | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 argc -= optind; | |
| 105 argv += optind; | |
| 106 | |
| 107 if (argc > 0) { | |
| 108 usage(); | |
| 109 exit(1); | |
| 110 } | |
| 111 | |
| 112 if (argc == 1 && *argv[0] != '-') | |
| 113 if ((in = fopen(argv[0], "rb")) == NULL) { | |
| 114 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 115 exit(1); | |
| 116 } | |
| 117 else | |
| 118 strcpy(input_name, argv[0]); | |
| 119 | |
| 120 if (s) | |
| 121 srandom(s); | |
| 122 else | |
| 123 srandom(time(NULL) * getpid()); | |
| 124 | |
| 125 if (n > 0) { | |
| 126 nb = fread(signature, sizeof(char), i = NBITSTOBYTES(n), in); | |
| 127 if (nb < i) { | |
| 128 fprintf(stderr, "%s: failed to read all %d signature bits from %s\n", progname, n, input_name); | |
| 129 exit(1); | |
| 130 } | |
| 131 } | |
| 132 else { | |
| 133 int n_square; | |
| 134 if (fscanf(in, "%128[^\n\r]", signature) == EOF) { | |
| 135 fprintf(stderr, "%s: failed to read signature bits from %s\n", progname, input_name); | |
| 136 exit(1); | |
| 137 } | |
| 138 nb = strlen(signature); | |
| 139 n = NBYTESTOBITS(nb); | |
| 140 n_square = (int) sqrt(n) * (int) sqrt(n); | |
| 141 fprintf(stderr, "%s: got %d signature bits, truncated to %d\n", progname, n, n_square); | |
| 142 n = n_square; | |
| 143 nb = NBITSTOBYTES(n); | |
| 144 if (n < 1) { | |
| 145 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n); | |
| 146 exit(1); | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 fprintf(out, "KDSG\n"); | |
| 151 fprintf(out, "%d\n", n); | |
| 152 fprintf(out, "%d\n", e); | |
| 153 fprintf(out, "%d\n", f); | |
| 154 fprintf(out, "%s\n", F); | |
| 155 fprintf(out, "%d\n", l); | |
| 156 fprintf(out, "%f\n", q); | |
| 157 fprintf(out, "%d\n", random()); | |
| 158 fwrite(signature, sizeof(char), nb, out); | |
| 159 fprintf(out, "\n"); | |
| 160 | |
| 161 fclose(out); | |
| 162 | |
| 163 exit(0); | |
| 164 } |