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comparison Meerwald-dir/gen_xie2_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_xie2_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-q n\t\tquantization level\n");
17 fprintf(stderr, "\t-s file\t\tuse signature file's embedding information\n");
18 fprintf(stderr, "\t-S n\t\tseed\n");
19 fprintf(stderr, "\t-v n\t\tverbosity level\n");
20 exit(0);
21 }
22
23 int main(int argc, char *argv[]) {
24 FILE *in = stdin;
25 FILE *out = stdout;
26 FILE *sig = NULL;
27
28 char output_name[MAXPATHLEN] = "(stdout)";
29 char input_name[MAXPATHLEN] = "(stdin)";
30 char signature_name[MAXPATHLEN];
31
32 int verbose = 0;
33 int c;
34 int i;
35 double a = 0.5;
36 int q = 4;
37 int l = 5;
38 int n = 0, nb;
39 int s = 0;
40 int e = 2;
41 int f = 1;
42 char F[MAXPATHLEN] = "filter.dat";
43
44 progname = argv[0];
45 wm_init();
46
47 while ((c = getopt(argc, argv, "a:e:f:F:h?l:n:o:s:S:v:q:")) != EOF) {
48 switch (c) {
49 case 'a':
50 a = atof(optarg);
51 if (a <= 0.0) {
52 fprintf(stderr, "%s: embedding strength %f out of range\n", progname, a);
53 exit(1);
54 }
55 break;
56 case 'e':
57 e = atoi(optarg);
58 if (e < 0) {
59 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e);
60 }
61 break;
62 case 'q':
63 q = atoi(optarg);
64 break;
65 case 'f':
66 f = atoi(optarg);
67 if (f <= 0) {
68 fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
69 exit(1);
70 }
71 break;
72 case 'F':
73 strcpy(F, optarg);
74 break;
75 case 'h':
76 case '?':
77 usage();
78 break;
79 case 'l':
80 l = atoi(optarg);
81 if (l < 1) {
82 fprintf(stderr, "%s: embedding level out of range\n", progname);
83 exit(1);
84 }
85 break;
86 case 'n':
87 n = atoi(optarg);
88 if (n < 1 || n > 1000) {
89 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
90 exit(1);
91 }
92 break;
93 case 'o':
94 if ((out = fopen(optarg, "wb")) == NULL) {
95 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
96 exit(1);
97 }
98 strcpy(output_name, optarg);
99 break;
100 case 's':
101 if ((sig = fopen(optarg, "r")) == NULL) {
102 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
103 exit(1);
104 }
105 strcpy(signature_name, optarg);
106 break;
107 case 'S':
108 s = atoi(optarg);
109 break;
110 case 'v':
111 verbose = atoi(optarg);
112 if (verbose < 0) {
113 fprintf(stderr, "%s: verbosity level %d out of range", progname, verbose);
114 exit(1);
115 }
116 break;
117 }
118 }
119
120 argc -= optind;
121 argv += optind;
122
123 if (argc > 1) {
124 usage();
125 exit(1);
126 }
127
128 if (argc == 1 && *argv[0] != '-') {
129 if ((in = fopen(argv[0], "rb")) == NULL) {
130 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
131 exit(1);
132 }
133 else
134 strcpy(input_name, argv[0]);
135 }
136
137 if (sig) {
138 char line[32];
139 fgets(line, sizeof(line), sig);
140 if (strspn(line, "XE2SG") >= 5) {
141 if (n == 0)
142 fscanf(sig, "%d\n", &n);
143 else
144 fscanf(sig, "%*d\n");
145 if (a == 0.0)
146 fscanf(sig, "%lf\n", &a);
147 else
148 fscanf(sig, "%*f\n");
149 if (e < 0)
150 fscanf(sig, "%d\n", &e);
151 else
152 fscanf(sig, "%*d\n");
153 if (f == 0)
154 fscanf(sig, "%d\n", &f);
155 else
156 fscanf(sig, "%*d\n");
157 if (!strcmp(F, ""))
158 fscanf(sig, "%[^\n\r]\n", F);
159 else
160 fscanf(sig, "%*[^\n\r]\n");
161 if (q == 0)
162 fscanf(sig, "%d\n", &q);
163 else
164 fscanf(sig, "%*d\n");
165 if (l == 0)
166 fscanf(sig, "%d\n", &l);
167 else
168 fscanf(sig, "%*d\n");
169 }
170 else {
171 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
172 exit(1);
173 }
174 fclose(sig);
175 }
176
177 if (s)
178 srandom(s);
179 else
180 srandom(time(NULL) * getpid());
181
182 if (n > 0) {
183 nb = fread(signature, sizeof(char), i = NBITSTOBYTES(n), in);
184 if (nb < i) {
185 fprintf(stderr, "%s: failed to read all %d signature bits from %s\n", progname, n, input_name);
186 exit(1);
187 }
188 }
189 else {
190 if (fscanf(in, "%128[^\n\r]", signature) == EOF) {
191 fprintf(stderr, "%s: failed to read signature bits from %s\n", progname, input_name);
192 exit(1);
193 }
194 nb = strlen(signature);
195 n = NBYTESTOBITS(nb);
196 fprintf(stderr, "%s: got %d signature bits\n", progname, n);
197 }
198
199 fprintf(out, "XE2SG\n");
200 fprintf(out, "%d\n", n);
201 fprintf(out, "%f\n", a);
202 fprintf(out, "%d\n", e);
203 fprintf(out, "%d\n", f);
204 fprintf(out, "%s\n", F);
205 fprintf(out, "%d\n", q);
206 fprintf(out, "%d\n", l);
207 fprintf(out, "%ld\n", random());
208 fwrite(signature, sizeof(char), nb, out);
209 fprintf(out, "\n");
210
211 fclose(out);
212
213 exit(0);
214 }

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