Mercurial > hg > wm
comparison Meerwald/gen_frid2_sig.c @ 0:be303a3f5ea8
import
| author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
|---|---|
| date | Sun, 12 Aug 2007 13:14:34 +0200 |
| parents | |
| children | f83ef905a63d |
comparison
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| -1:000000000000 | 0:be303a3f5ea8 |
|---|---|
| 1 #include "wm.h" | |
| 2 #include "signature.h" | |
| 3 | |
| 4 char *progname; | |
| 5 | |
| 6 void usage(void) { | |
| 7 fprintf(stderr, "usage: %s [-a n] [-g n] [-o file] [-s n] file\n\n", progname); | |
| 8 fprintf(stderr, "\t-a n\t\talpha factor (default 0.25)\n"); | |
| 9 fprintf(stderr, "\t-g n\t\tgamma factor (default 1.0)\n"); | |
| 10 fprintf(stderr, "\t-s n\t\tseed (default 0)\n"); | |
| 11 fprintf(stderr, "\t-h\t\tprint usage\n"); | |
| 12 fprintf(stderr, "\t-n n\t\twatermark length (default 100)\n"); | |
| 13 fprintf(stderr, "\t-o file\t\toutput file\n"); | |
| 14 fprintf(stderr, "\t-s file\t\tuse signature file's embedding information\n"); | |
| 15 fprintf(stderr, "\t-S n\t\tseed\n"); | |
| 16 exit(0); | |
| 17 } | |
| 18 | |
| 19 int main(int argc, char *argv[]) { | |
| 20 FILE *in = stdin; | |
| 21 FILE *out = stdout; | |
| 22 FILE *sig = NULL; | |
| 23 | |
| 24 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 25 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 26 char signature_name[MAXPATHLEN]; | |
| 27 | |
| 28 int c; | |
| 29 int i; | |
| 30 int n = 100, nb; | |
| 31 double a = 0.25; | |
| 32 double g = 1.0; | |
| 33 int s = 0; | |
| 34 | |
| 35 progname = argv[0]; | |
| 36 | |
| 37 #ifdef __EMX__ | |
| 38 _fsetmode(in, "b"); | |
| 39 _fsetmode(out, "b"); | |
| 40 #endif | |
| 41 | |
| 42 while ((c = getopt(argc, argv, "a:g:h?n:o:s:S:")) != EOF) { | |
| 43 switch (c) { | |
| 44 case 'a': | |
| 45 a = atof(optarg); | |
| 46 if (a <= 0.0) { | |
| 47 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a); | |
| 48 exit(1); | |
| 49 } | |
| 50 break; | |
| 51 case 'g': | |
| 52 g = atof(optarg); | |
| 53 if (g <= 0.0) { | |
| 54 fprintf(stderr, "%s: gamma factor %f out of range\n", progname, a); | |
| 55 exit(1); | |
| 56 } | |
| 57 break; | |
| 58 case 'h': | |
| 59 case '?': | |
| 60 usage(); | |
| 61 break; | |
| 62 case 'n': | |
| 63 n = atoi(optarg); | |
| 64 if (n < 1 || n > 1000) { | |
| 65 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n); | |
| 66 exit(1); | |
| 67 } | |
| 68 break; | |
| 69 case 'o': | |
| 70 if ((out = fopen(optarg, "w")) == NULL) { | |
| 71 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 72 exit(1); | |
| 73 } | |
| 74 strcpy(output_name, optarg); | |
| 75 break; | |
| 76 case 's': | |
| 77 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 78 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 79 exit(1); | |
| 80 } | |
| 81 strcpy(signature_name, optarg); | |
| 82 break; | |
| 83 case 'S': | |
| 84 s = atoi(optarg); | |
| 85 break; | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 argc -= optind; | |
| 90 argv += optind; | |
| 91 | |
| 92 if (argc > 1) { | |
| 93 usage(); | |
| 94 exit(1); | |
| 95 } | |
| 96 | |
| 97 if (argc == 1 && *argv[0] != '-') | |
| 98 if ((in = fopen(argv[0], "rb")) == NULL) { | |
| 99 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 100 exit(1); | |
| 101 } | |
| 102 else | |
| 103 strcpy(input_name, argv[0]); | |
| 104 | |
| 105 if (!s) | |
| 106 s = time(NULL) * getpid(); | |
| 107 srandom(s); | |
| 108 | |
| 109 if (sig) { | |
| 110 char line[128]; | |
| 111 fgets(line, sizeof(line), sig); | |
| 112 if (strspn(line, "FR2SG") >= 5) { | |
| 113 } | |
| 114 else { | |
| 115 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 116 exit(1); | |
| 117 } | |
| 118 fclose(sig); | |
| 119 } | |
| 120 | |
| 121 if (n > 0) { | |
| 122 nb = fread(signature, sizeof(char), i = NBITSTOBYTES(n), in); | |
| 123 if (nb < i) { | |
| 124 fprintf(stderr, "%s: failed to read all %d signature bits from %s\n", progname, n, input_name); | |
| 125 exit(1); | |
| 126 } | |
| 127 } | |
| 128 else { | |
| 129 if (fscanf(in, "%128[^\n\r]", signature) == EOF) { | |
| 130 fprintf(stderr, "%s: failed to read signature bits from %s\n", progname, input_name); | |
| 131 exit(1); | |
| 132 } | |
| 133 nb = strlen(signature); | |
| 134 n = NBYTESTOBITS(nb); | |
| 135 fprintf(stderr, "%s: got %d signature bits\n", progname, n); | |
| 136 } | |
| 137 | |
| 138 fprintf(out, "FR2SG\n"); | |
| 139 fprintf(out, "%d\n", n); | |
| 140 fprintf(out, "%f\n", a); | |
| 141 fprintf(out, "%f\n", g); | |
| 142 fprintf(out, "%d\n", s); | |
| 143 fwrite(signature, sizeof(char), nb, out); | |
| 144 fprintf(out, "\n"); | |
| 145 | |
| 146 fclose(out); | |
| 147 | |
| 148 exit(0); | |
| 149 } |