blind-norm.c - blind - suckless command-line video editing utility
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blind-norm.c (1695B)
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1 /* See LICENSE file for copyright and license details. */
2 #ifndef TYPE
3 #include "common.h"
4
5 USAGE("[-axyz]")
6
7 static int skip_a = 0;
8 static int skip_x = 0;
9 static int skip_y = 0;
10 static int skip_z = 0;
11
12 #define FILE "blind-norm.c"
13 #include "define-functions.h"
14
15 int
16 main(int argc, char *argv[])
17 {
18 struct stream stream;
19 void (*process)(struct stream *stream);
20
21 ARGBEGIN {
22 case 'a':
23 skip_a = 1;
24 break;
25 case 'x':
26 skip_x = 1;
27 break;
28 case 'y':
29 skip_y = 1;
30 break;
31 case 'z':
32 skip_z = 1;
33 break;
34 default:
35 usage();
36 } ARGEND;
37
38 if (argc)
39 usage();
40
41 eopen_stream(&stream, NULL);
42
43 SELECT_PROCESS_FUNCTION(&stream);
44 CHECK_ALPHA_CHAN(&stream);
45 CHECK_N_CHAN(&stream, 4, 4);
46
47 fprint_stream_head(stdout, &stream);
48 efflush(stdout, "<stdout>");
49 process(&stream);
50 return 0;
51 }
52
53 #else
54
55 static void
56 PROCESS(struct stream *stream)
57 {
58 size_t i, n;
59 TYPE x, y, z, a, norm;
60 do {
61 n = stream->ptr / stream->pixel_size;
62 for (i = 0; i < n; i++) {
63 x = ((TYPE *)(stream->buf))[4 * i + 0];
64 y = ((TYPE *)(stream->buf))[4 * i + 1];
65 z = ((TYPE *)(stream->buf))[4 * i + 2];
66 a = ((TYPE *)(stream->buf))[4 * i + 3];
67 norm = sqrt(x * x + y * y + z * z + a * a);
68 if (!skip_x)
69 ((TYPE *)(stream->buf))[4 * i + 0] = norm;
70 if (!skip_y)
71 ((TYPE *)(stream->buf))[4 * i + 1] = norm;
72 if (!skip_z)
73 ((TYPE *)(stream->buf))[4 * i + 2] = norm;
74 if (!skip_a)
75 ((TYPE *)(stream->buf))[4 * i + 3] = norm;
76 }
77 n *= stream->pixel_size;
78 ewriteall(STDOUT_FILENO, stream->buf, n, "<stdout>");
79 memmove(stream->buf, stream->buf + n, stream->ptr -= n);
80 } while (eread_stream(stream, SIZE_MAX));
81 if (stream->ptr)
82 eprintf("%s: incomplete frame\n", stream->file);
83 }
84
85 #endif