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comparison Meerwald-dir/gen_kund2_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_kund2_sig.c@ad1d224896c5
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 [-b n] [-e n] [-f n] [-F file] [-l n] [-n n] [-o file] [-q n] [-s file] [-S n] [-v n] file\n\n", progname);
8 fprintf(stderr, "\t-h\t\tprint usage\n");
9 fprintf(stderr, "\t-b n\t\tblock size (default 64)\n");
10 fprintf(stderr, "\t-e n\t\twavelet filtering method (default 2)\n");
11 fprintf(stderr, "\t-f n\t\tfilter number (default 1)\n");
12 fprintf(stderr, "\t-F file\t\tfilter definition file (default 'filter.dat')\n");
13 fprintf(stderr, "\t-l n\t\tembedding level (default 1)\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\tsignature strength (default 4)\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 char *binstr;
32
33 int verbose = 0;
34 int c;
35 int i;
36 int l = 3;
37 int n = 0;
38 int s = 0;
39 int q = 4;
40 int e = 2;
41 int f = 1;
42 int blocksize = 64;
43 char F[MAXPATHLEN] = "filter.dat";
44
45 progname = argv[0];
46
47 wm_init();
48
49 while ((c = getopt(argc, argv, "b:e:f:F:h?l:n:o:q:s:S:v:")) != EOF) {
50 switch (c) {
51 case 'b':
52 blocksize = atoi(optarg);
53 if (blocksize < 0)
54 fprintf(stderr, "%s: block size %d out of range\n", progname, blocksize);
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 'f':
63 f = atoi(optarg);
64 if (f <= 0) {
65 fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
66 exit(1);
67 }
68 break;
69 case 'F':
70 strcpy(F, optarg);
71 break;
72 case 'h':
73 case '?':
74 usage();
75 break;
76 case 'l':
77 l = atoi(optarg);
78 if (l < 1) {
79 fprintf(stderr, "%s: embedding level out of range\n", progname);
80 exit(1);
81 }
82 break;
83 case 'n':
84 n = atoi(optarg);
85 if (n < 1 || n > 1000) {
86 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
87 exit(1);
88 }
89 break;
90 case 'o':
91 if ((out = fopen(optarg, "wb")) == NULL) {
92 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
93 exit(1);
94 }
95 strcpy(output_name, optarg);
96 break;
97 case 'q':
98 q = atoi(optarg);
99 if (q < 1) {
100 fprintf(stderr, "%s: signature strength %d out of range\n", progname, q);
101 exit(1);
102 }
103 break;
104 case 's':
105 if ((sig = fopen(optarg, "r")) == NULL) {
106 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
107 exit(1);
108 }
109 strcpy(signature_name, optarg);
110 break;
111 case 'S':
112 s = atoi(optarg);
113 break;
114 case 'v':
115 verbose = atoi(optarg);
116 if (verbose < 0) {
117 fprintf(stderr, "%s: verbosity level %d out of range", progname, verbose);
118 exit(1);
119 }
120 break;
121 }
122 }
123
124 argc -= optind;
125 argv += optind;
126
127 if (argc > 1) {
128 usage();
129 exit(1);
130 }
131
132 if (argc == 1 && *argv[0] != '-') {
133 if ((in = fopen(argv[0], "rb")) == NULL) {
134 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
135 exit(1);
136 }
137 else
138 strcpy(input_name, argv[0]);
139 }
140
141 if (sig) {
142 char line[32];
143 fgets(line, sizeof(line), sig);
144 if (strspn(line, "KD2SG") >= 5) {
145 if (n == 0)
146 fscanf(sig, "%d\n", &n);
147 else
148 fscanf(sig, "%*d\n");
149 if (q == 0)
150 fscanf(sig, "%d\n", &q);
151 else
152 fscanf(sig, "%*d\n");
153 if (blocksize == 0)
154 fscanf(sig, "%d\n", &blocksize);
155 else
156 fscanf(sig, "%*d\n");
157 if (e < 0)
158 fscanf(sig, "%d\n", &e);
159 else
160 fscanf(sig, "%*d\n");
161 if (f == 0)
162 fscanf(sig, "%d\n", &f);
163 else
164 fscanf(sig, "%*d\n");
165 if (!strcmp(F, ""))
166 fscanf(sig, "%[^\n\r]\n", F);
167 else
168 fscanf(sig, "%*[^\n\r]\n");
169 if (l == 0)
170 fscanf(sig, "%d\n", &l);
171 else
172 fscanf(sig, "%*d\n");
173 }
174 else {
175 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
176 exit(1);
177 }
178 fclose(sig);
179 }
180
181 if (s)
182 srandom(s);
183 else
184 srandom(time(NULL) * getpid());
185
186 if (n > 0) {
187 n_signature = fread(signature, sizeof(char), i = NBITSTOBYTES(n), in);
188 nbit_signature = NBYTESTOBITS(n_signature);
189 if (n_signature < i) {
190 fprintf(stderr, "%s: failed to read all %d signature bits from %s\n", progname, n, input_name);
191 exit(1);
192 }
193 }
194 else {
195 if (fscanf(in, "%128[^\n\r]", signature) == EOF) {
196 fprintf(stderr, "%s: failed to read signature bits from %s\n", progname, input_name);
197 exit(1);
198 }
199 n_signature = strlen(signature);
200 nbit_signature = NBYTESTOBITS(n_signature);
201 fprintf(stderr, "%s: got %d signature bits\n", progname, nbit_signature);
202 }
203
204 fprintf(out, "KD2SG\n");
205 fprintf(out, "%d\n", nbit_signature);
206 fprintf(out, "%d\n", q);
207 fprintf(out, "%d\n", blocksize);
208 fprintf(out, "%d\n", e);
209 fprintf(out, "%d\n", f);
210 fprintf(out, "%s\n", F);
211 fprintf(out, "%d\n", l);
212 fprintf(out, "%ld\n", random());
213 binstr = malloc((nbit_signature + 1) * sizeof(char));
214 sig_to_binstr(binstr);
215 fprintf(out, "%s\n", binstr);
216 free(binstr);
217
218 fclose(out);
219
220 exit(0);
221 }

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