1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* See LICENSE file for copyright and license details. */
#include "stream.h"
#include "util.h"
#include <string.h>
USAGE("[-l left] [-r right] [-a above] [-b below] [-t]")
int
main(int argc, char *argv[])
{
struct stream stream;
char *buf, *image;
size_t m, imgw, imgh, rown;
size_t xoff, yoff, h, x, y;
size_t left = 0, right = 0, top = 0, bottom = 0;
int tile = 0;
ARGBEGIN {
case 'l':
left = etozu_flag('l', UARGF(), 0, SIZE_MAX);
break;
case 'r':
right = etozu_flag('r', UARGF(), 0, SIZE_MAX);
break;
case 'a':
top = etozu_flag('a', UARGF(), 0, SIZE_MAX);
break;
case 'b':
bottom = etozu_flag('b', UARGF(), 0, SIZE_MAX);
break;
case 't':
tile = 1;
break;
default:
usage();
} ARGEND;
if (argc)
usage();
eopen_stream(&stream, NULL);
echeck_dimensions(&stream, WIDTH | HEIGHT, NULL);
buf = emalloc(stream.frame_size);
if (stream.width > SIZE_MAX - left)
eprintf("<stdout>: output video is too wide\n");
imgw = stream.width + left;
if (imgw > SIZE_MAX - right)
eprintf("<stdout>: output video is too wide\n");
imgw += right;
if (stream.height > SIZE_MAX - top)
eprintf("<stdout>: output video is too tall\n");
imgh = stream.height + top;
if (imgh > SIZE_MAX - bottom)
eprintf("<stdout>: output video is too tall\n");
imgh += bottom;
echeck_dimensions_custom(imgw, imgh, 0, stream.pixel_size, "output", "<stdout>");
m = imgh * (imgw *= stream.pixel_size);
image = tile ? emalloc(m) : ecalloc(1, m);
stream.width += left + right;
h = stream.height += top + bottom;
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
stream.width -= left + right;
stream.height -= top + bottom;
left *= stream.pixel_size;
right *= stream.pixel_size;
rown = stream.width * stream.pixel_size;
xoff = (rown - left % rown) % rown;
yoff = (stream.height - top % stream.height) % stream.height;
while (eread_frame(&stream, buf)) {
if (!tile) {
for (y = 0; y < stream.height; y++)
memcpy(image + left + (y + top) * imgw, buf + y * rown, rown);
} else {
for (y = 0; y < stream.height; y++)
for (x = 0; x < imgw; x++)
image[x + (y + top) * imgw] = buf[(x + xoff) % rown + y * rown];
for (y = 0; y < top; y++)
memcpy(image + y * imgw, image + ((y + yoff) % stream.height + top) * imgw, imgw);
for (y = top + stream.height; y < h; y++)
memcpy(image + y * imgw, image + ((y + yoff) % stream.height + top) * imgw, imgw);
}
ewriteall(STDOUT_FILENO, image, m, "<stdout>");
}
free(buf);
free(image);
return 0;
}
|
