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comparison Meerwald/cmp_frid2_sig.c @ 0:be303a3f5ea8

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import
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Sun, 12 Aug 2007 13:14:34 +0200
parents
children f83ef905a63d
comparison
equal deleted inserted replaced
-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 [-h] [-C] [-o file] [-v n] -s file file\n\n", progname);
8 fprintf(stderr, "\t-C\t\toutput correlation only\n");
9 fprintf(stderr, "\t-h\t\tprint usage\n");
10 fprintf(stderr, "\t-o file\t\toutput file\n");
11 fprintf(stderr, "\t-s file\t\toriginal signature file\n");
12 fprintf(stderr, "\t-v n\t\tverbosity level\n");
13 exit(0);
14 }
15
16 int main(int argc, char *argv[]) {
17
18 FILE *in = stdin;
19 FILE *out = stdout;
20 FILE *sig = NULL;
21
22 char signature_name[MAXPATHLEN];
23 char output_name[MAXPATHLEN] = "(stdout)";
24 char input_name[MAXPATHLEN] = "(stdin)";
25
26 int correlation_only = 0;
27
28 int c, i;
29 int corr1 = 0, match1 = 0;
30 int corr2 = 0, match2 = 0;
31 int verbose = 0;
32 char filter_name[MAXPATHLEN] = "";
33
34 int seed;
35 char line[32];
36
37 progname = argv[0];
38
39 while ((c = getopt(argc, argv, "h?Co:s:v:")) != EOF) {
40 switch (c) {
41 case 'h':
42 case '?':
43 usage();
44 break;
45 case 'C':
46 correlation_only = 1;
47 break;
48 case 'o':
49 if ((out = fopen(optarg, "w")) == NULL) {
50 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
51 exit(1);
52 }
53 strcpy(output_name, optarg);
54 break;
55 case 's':
56 if ((sig = fopen(optarg, "r")) == NULL) {
57 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
58 exit(1);
59 }
60 strcpy(signature_name, optarg);
61 break;
62 case 'v':
63 verbose = atoi(optarg);
64 if (verbose < 0) {
65 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
66 exit(1);
67 }
68 break;
69 }
70 }
71
72 argc -= optind;
73 argv += optind;
74
75 if (argc > 1) {
76 usage();
77 exit(1);
78 }
79
80 if (argc == 1 && *argv[0] != '-')
81 if ((in = fopen(argv[0], "r")) == NULL) {
82 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
83 exit(1);
84 }
85 else
86 strcpy(input_name, argv[0]);
87
88 if (sig) {
89 fgets(line, sizeof(line), sig);
90 if (strspn(line, "FR2SG") >= 5) {
91 fscanf(sig, "%d\n", &nbit_signature);
92 fscanf(sig, "%*lf\n");
93 fscanf(sig, "%*lf\n");
94 fscanf(sig, "%*d\n");
95 n_signature = NBITSTOBYTES(nbit_signature);
96 fread(signature, sizeof(char), n_signature, sig);
97 fscanf(sig, "\n");
98 }
99 else {
100 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
101 exit(1);
102 }
103 close(sig);
104 }
105 else {
106 fprintf(stderr, "%s: original signature file not specified, use -s file option\n", progname);
107 exit(1);
108 }
109
110 fgets(line, sizeof(line), in);
111 if (strspn(line, "FR2WM") >= 5) {
112 fscanf(in, "%d\n", &nbit_signature1);
113 n_signature1 = NBITSTOBYTES(nbit_signature1);
114 fread(signature1, sizeof(char), n_signature1, in);
115 // fscanf(in, "\n");
116 fscanf(in, "%d\n", &nbit_signature2);
117 n_signature2 = NBITSTOBYTES(nbit_signature2);
118 fread(signature2, sizeof(char), n_signature2, in);
119 fscanf(in, "\n");
120 }
121 else {
122 fprintf(stderr, "%s: invalid watermark file %s\n", progname, input_name);
123 exit(1);
124 }
125
126 if (verbose > 0) {
127 fprintf(stderr, "signature length: %d\n", nbit_signature);
128 fprintf(stderr, "watermark length (low. freq.): %d\n", nbit_signature1);
129 fprintf(stderr, "watermark length (med. freq.): %d\n", nbit_signature2);
130 }
131
132 for (i = 0; i < nbit_signature; i++) {
133 if (get_signature_bit(i) == get_signature1_bit(i))
134 corr1++, match1++;
135 else
136 corr1--;
137 if (get_signature_bit(i) == get_signature2_bit(i))
138 corr2++, match2++;
139 else
140 corr2--;
141 }
142
143 if (correlation_only)
144 fprintf(out, "%lf\n", (double) (corr1 + corr2) / (nbit_signature1 + nbit_signature2));
145 else {
146 fprintf(out, "bit matches (low freq.): %d/%d\n", match1, nbit_signature1);
147 fprintf(out, "correlation (low. freq.): %lf\n", (double) corr1 / nbit_signature1);
148 fprintf(out, "bit matches (med. freq.): %d/%d\n", match2, nbit_signature2);
149 fprintf(out, "correlation (med. freq.): %lf\n", (double) corr2 / nbit_signature2);
150 fprintf(out, "total correlation: %lf\n", (double) (corr1 + corr2) / (nbit_signature1 + nbit_signature2));
151 }
152
153 exit(0);
154 }

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