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comparison Meerwald-dir/gen_xie_sig.c @ 24:9f20bce6184e v0.7

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move directories, support netpbm 11
author Peter Meerwald-Stadler <pmeerw@pmeerw.net>
date Fri, 20 Dec 2024 13:08:59 +0100
parents Meerwald/gen_xie_sig.c@4987db85cfae
children
comparison
equal deleted inserted replaced
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 [-a n] [-e n] [-f n] [-F file] [-l n] [-n n] [-o file] [-s file] [-S n] [-v n] file\n\n", progname);
8 fprintf(stderr, "\t-a n\t\tembedding strength (default 0.5)\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-h\t\tprint usage\n");
13 fprintf(stderr, "\t-l n\t\tembedding level (default 5)\n");
14 fprintf(stderr, "\t-n n\t\twatermark bit length\n");
15 fprintf(stderr, "\t-o file\t\toutput file\n");
16 fprintf(stderr, "\t-s file\t\tuse signature file's embedding information\n");
17 fprintf(stderr, "\t-S n\t\tseed\n");
18 fprintf(stderr, "\t-v n\t\tverbosity level\n");
19 exit(0);
20 }
21
22 int main(int argc, char *argv[]) {
23 FILE *in = stdin;
24 FILE *out = stdout;
25 FILE *sig = NULL;
26
27 char output_name[MAXPATHLEN] = "(stdout)";
28 char input_name[MAXPATHLEN] = "(stdin)";
29 char signature_name[MAXPATHLEN];
30
31 int verbose = 0;
32 int c;
33 int i;
34 double a = 0.5;
35 int l = 5;
36 int n = 0, nb;
37 int s = 0;
38 int e = 2;
39 int f = 1;
40 char F[MAXPATHLEN] = "filter.dat";
41
42 progname = argv[0];
43 wm_init();
44
45 while ((c = getopt(argc, argv, "a:e:f:F:h?l:n:o:s:S:v:")) != EOF) {
46 switch (c) {
47 case 'a':
48 a = atof(optarg);
49 if (a <= 0.0) {
50 fprintf(stderr, "%s: embedding strength %f out of range\n", progname, a);
51 exit(1);
52 }
53 break;
54 case 'e':
55 e = atoi(optarg);
56 if (e < 0) {
57 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e);
58 }
59 break;
60 case 'f':
61 f = atoi(optarg);
62 if (f <= 0) {
63 fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
64 exit(1);
65 }
66 break;
67 case 'F':
68 strcpy(F, optarg);
69 break;
70 case 'h':
71 case '?':
72 usage();
73 break;
74 case 'l':
75 l = atoi(optarg);
76 if (l < 1) {
77 fprintf(stderr, "%s: embedding level out of range\n", progname);
78 exit(1);
79 }
80 break;
81 case 'n':
82 n = atoi(optarg);
83 if (n < 1 || n > 1000) {
84 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
85 exit(1);
86 }
87 break;
88 case 'o':
89 if ((out = fopen(optarg, "wb")) == NULL) {
90 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
91 exit(1);
92 }
93 strcpy(output_name, optarg);
94 break;
95 case 's':
96 if ((sig = fopen(optarg, "r")) == NULL) {
97 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
98 exit(1);
99 }
100 strcpy(signature_name, optarg);
101 break;
102 case 'S':
103 s = atoi(optarg);
104 break;
105 case 'v':
106 verbose = atoi(optarg);
107 if (verbose < 0) {
108 fprintf(stderr, "%s: verbosity level %d out of range", progname, verbose);
109 exit(1);
110 }
111 break;
112 }
113 }
114
115 argc -= optind;
116 argv += optind;
117
118 if (argc > 1) {
119 usage();
120 exit(1);
121 }
122
123 if (argc == 1 && *argv[0] != '-') {
124 if ((in = fopen(argv[0], "rb")) == NULL) {
125 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
126 exit(1);
127 }
128 else
129 strcpy(input_name, argv[0]);
130 }
131
132 if (sig) {
133 char line[32];
134 fgets(line, sizeof(line), sig);
135 if (strspn(line, "XESG") >= 4) {
136 if (n == 0)
137 fscanf(sig, "%d\n", &n);
138 else
139 fscanf(sig, "%*d\n");
140 if (a == 0.0)
141 fscanf(sig, "%lf\n", &a);
142 else
143 fscanf(sig, "%*f\n");
144 if (e < 0)
145 fscanf(sig, "%d\n", &e);
146 else
147 fscanf(sig, "%*d\n");
148 if (f == 0)
149 fscanf(sig, "%d\n", &f);
150 else
151 fscanf(sig, "%*d\n");
152 if (!strcmp(F, ""))
153 fscanf(sig, "%[^\n\r]\n", F);
154 else
155 fscanf(sig, "%*[^\n\r]\n");
156 if (l == 0)
157 fscanf(sig, "%d\n", &l);
158 else
159 fscanf(sig, "%*d\n");
160 }
161 else {
162 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
163 exit(1);
164 }
165 fclose(sig);
166 }
167
168 if (s)
169 srandom(s);
170 else
171 srandom(time(NULL) * getpid());
172
173 if (n > 0) {
174 nb = fread(signature, sizeof(char), i = NBITSTOBYTES(n), in);
175 if (nb < i) {
176 fprintf(stderr, "%s: failed to read all %d signature bits from %s\n", progname, n, input_name);
177 exit(1);
178 }
179 }
180 else {
181 if (fscanf(in, "%128[^\n\r]", signature) == EOF) {
182 fprintf(stderr, "%s: failed to read signature bits from %s\n", progname, input_name);
183 exit(1);
184 }
185 nb = strlen(signature);
186 n = NBYTESTOBITS(nb);
187 fprintf(stderr, "%s: got %d signature bits\n", progname, n);
188 }
189
190 fprintf(out, "XESG\n");
191 fprintf(out, "%d\n", n);
192 fprintf(out, "%f\n", a);
193 fprintf(out, "%d\n", e);
194 fprintf(out, "%d\n", f);
195 fprintf(out, "%s\n", F);
196 fprintf(out, "%d\n", l);
197 fprintf(out, "%ld\n", random());
198 fwrite(signature, sizeof(char), nb, out);
199 fprintf(out, "\n");
200
201 fclose(out);
202
203 exit(0);
204 }

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