annotate Meerwald/wm_koch_d.c @ 1:647ab0f05aae v0.4

drop, not needed
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Tue, 14 Aug 2007 19:58:25 +0200
parents be303a3f5ea8
children f83ef905a63d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
1 #include "wm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
2 #include "dct.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
3 #include "signature.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
4 #include "coord.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
5 #include "pgm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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6
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
7 char *progname;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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8
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
9 void usage(void) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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10 fprintf(stderr, "usage: %s [-h] [-l n] [-o file] [-q n] [-v n] -s file file\n\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
11 fprintf(stderr, "\t-h\t\tprint usage\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
12 fprintf(stderr, "\t-l n\t\tsignature robustness factor\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
13 fprintf(stderr, "\t-o file\t\textracted signature file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
14 fprintf(stderr, "\t-q n\t\tquantization (JPEG quality) factor\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
15 fprintf(stderr, "\t-s file\t\toriginal signature file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
16 fprintf(stderr, "\t-v n\t\tverbosity level\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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17 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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18 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
19
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
20 int main(int argc, char *argv[]) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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21
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
22 FILE *in = stdin;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
23 FILE *out = stdout;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
24 FILE *sig = NULL;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
25
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
26 gray **image;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
27 struct coords *coords;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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28
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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29 char signature_name[MAXPATHLEN];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
30 char input_name[MAXPATHLEN] = "(stdin)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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31 char output_name[MAXPATHLEN] = "(stdout)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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32
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
33 int i;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
34 int j;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
35 int c;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
36 int n;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
37 int x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
38 int y;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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39
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
40 int rows, cols, format;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
41 gray maxval;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
42 int row, col;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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43
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
44 int seed;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
45 int verbose = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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46
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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47 double quality = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
48 int quantization = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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49
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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50 double **dcts;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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51
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
52 progname = argv[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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53
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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54 pgm_init(&argc, argv); wm_init();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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55
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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56 while ((c = getopt(argc, argv, "h?i:l:o:q:s:v:")) != EOF) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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57 switch (c) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
58 case 'h':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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59 case '?':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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60 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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61 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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62 case 'l':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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63 quality = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
64 if (quality <= 0.0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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65 fprintf(stderr, "%s: signature strength factor %f out of range\n", progname, quality);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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66 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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67 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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68 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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69 case 'o':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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70 if ((out = fopen(optarg, "wb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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71 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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72 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
73 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
74 strcpy(output_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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75 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
76 case 'q':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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77 quantization = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
78 if (quantization <= 0 || quantization > 100) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
79 fprintf(stderr, "%s: quantization factor %d out of range\n", progname, quantization);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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80 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
81 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
82 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
83 case 's':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
84 if ((sig = fopen(optarg, "r")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
85 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
86 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
87 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
88 strcpy(signature_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
89 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
90 case 'v':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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91 verbose = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
92 if (verbose < 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
93 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
94 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
95 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
96 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
97 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
98 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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99
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
100 argc -= optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
101 argv += optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
102
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
103 if (argc > 1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
104 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
105 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
106 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
107
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
108 if (argc == 1 && *argv[0] != '-')
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
109 if ((in = fopen(argv[0], "rb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
110 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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111 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
112 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
113 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
114 strcpy(input_name, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
115
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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116 if (sig) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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117 char line[128];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
118 fgets(line, sizeof(line), sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
119 if (strspn(line, "KCSG") >= 4) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
120 fscanf(sig, "%d\n", &nbit_signature);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
121 n_signature = NBITSTOBYTES(nbit_signature);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
122 if (quality == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
123 fscanf(sig, "%lf\n", &quality);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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124 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
125 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
126 if (quantization == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
127 fscanf(sig, "%d\n", &quantization);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
128 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
129 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
130 fscanf(sig, "%d\n", &seed);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
131 srandom(seed);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
132 fread(signature, sizeof(char), n_signature, sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
133 init_signature_bits();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
134 fscanf(sig, "\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
135 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
136 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
137 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
138 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
139 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
140 fclose(sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
141 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
142 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
143 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
144 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
145 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
146
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
147 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
148
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
149 if (cols % NJPEG) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
150 fprintf(stderr, "%s: image width %d not a multiple of %d\n", progname, cols, NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
151 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
152 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
153
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
154 if (rows % NJPEG) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
155 fprintf(stderr, "%s: image height %d not a multiple of %d\n", progname, rows, NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
156 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
157 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
158
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
159 if ((rows * cols) / (NJPEG * NJPEG) < nbit_signature) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
160 fprintf(stderr, "%s: image too small to extract %d bits of signature\n", progname, nbit_signature);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
161 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
162 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
163
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
164 init_dct_8x8();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
165 init_quantum_JPEG_lumin(quantization);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
166
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
167 dcts = alloc_coeffs_8x8();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
168
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
169 if ((coords = alloc_coords(nbit_signature)) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
170 fprintf(stderr, "%s: unable to allocate memory\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
171 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
172 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
173
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
174 image = pgm_allocarray(cols, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
175
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
176 for (row = 0; row < rows; row++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
177 pgm_readpgmrow(in, image[row], cols, maxval, format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
178
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
179 fclose(in);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
180
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
181 n = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
182 while (n < nbit_signature) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
183 int xb;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
184 int yb;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
185 int c1, c2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
186 double v1, v2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
187 double q = 1.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
188
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
189 do {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
190 xb = random() % (cols / NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
191 yb = random() % (rows / NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
192 } while (add_coord(coords, xb, yb) < 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
193
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
194 fdct_block_8x8(image, xb * NJPEG, yb * NJPEG, dcts);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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195
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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196 do {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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197 c1 = (random() % (NJPEG * NJPEG - 2)) + 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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198 c2 = (random() % (NJPEG * NJPEG - 2)) + 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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199 } while (c1 == c2 || !is_middle_frequency_coeff_8x8(c1) || !is_middle_frequency_coeff_8x8(c2));
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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200
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
201 quantize_8x8(dcts);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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202
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
203 if (verbose >= 1)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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204 fprintf(stderr, "%d: quantized DCT block (x %d/y %d), extracting (x %d/y %d), (x %d/y %d) ", n, xb * NJPEG, yb * NJPEG, c1 % NJPEG, c1 / NJPEG, c2 % NJPEG, c2 / NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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205
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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206 v1 = dcts[c1 / NJPEG][c1 % NJPEG];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
207 v2 = dcts[c2 / NJPEG][c2 % NJPEG];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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208
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
209 if (fabs(v1) > fabs(v2)) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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210 set_signature_bit(n, 1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
211 if (verbose >= 1)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
212 fprintf(stderr, "HIGH\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
213 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
214 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
215 set_signature_bit(n, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
216 if (verbose >= 1)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
217 fprintf(stderr, "LOW\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
218 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
219
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
220 if (verbose >= 2)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
221 print_coeffs_8x8(dcts);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
222
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
223 n++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
224 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
225
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
226 fprintf(out, "KCWM\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
227 fprintf(out, "%d\n", nbit_signature);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
228 fwrite(signature, sizeof(char), n_signature, out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
229 fprintf(out, "\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
230
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
231 fclose(out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
232
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
233 free_coeffs(dcts);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
234
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
235 pbm_freearray(image, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
236
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
237 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
238 }

Repositories maintained by Peter Meerwald, pmeerw@pmeerw.net.