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
97
98
99
100
101
102
103
104
105
106
107
108
|
/* See LICENSE file for copyright and license details. */
#include "common.h"
USAGE("([-f] count | 'inf') [file]")
static size_t count = 0;
static int inf;
static struct stream stream;
static int
repeat_regular_file(void)
{
stream.ptr = 0;
while (inf || count--) {
fadvise_sequential(stream.fd, (off_t)(stream.headlen), 0);
elseek(stream.fd, (off_t)(stream.headlen), SEEK_SET, stream.file);
if (esend_stream(&stream, STDOUT_FILENO, NULL))
return -1;
}
return 0;
}
static int
repeat_regular_file_framewise(void)
{
size_t i;
off_t off = (off_t)(stream.headlen);
stream.ptr = 0;
echeck_dimensions(&stream, WIDTH | HEIGHT | LENGTH, "input");
for (;; off += (off_t)(stream.frame_size)) {
for (i = 0; i < count; i++) {
elseek(stream.fd, off, SEEK_SET, stream.file);
if (!esend_frames(&stream, STDOUT_FILENO, 1, "<stdout>"))
return 0;
}
}
}
static int
repeat_stdin(void)
{
size_t ptr = stream.ptr;
size_t size = MAX(ptr, BUFSIZ);
char *buf = memcpy(emalloc(size), stream.buf, ptr);
egetfile(STDIN_FILENO, &buf, &ptr, &size, "<stdout>");
while (inf || count--)
if (writeall(STDOUT_FILENO, buf, ptr))
return free(buf), -1;
return free(buf), 0;
}
static int
repeat_stdin_framewise(void)
{
char *buf;
size_t i;
echeck_dimensions(&stream, WIDTH | HEIGHT, "input");
buf = emalloc(stream.frame_size);
while (eread_frame(&stream, buf))
for (i = 0; i < count; i++)
if (writeall(STDOUT_FILENO, buf, stream.frame_size))
return free(buf), -1;
return free(buf), 0;
}
int
main(int argc, char *argv[])
{
int framewise = 0;
ARGBEGIN {
case 'f':
framewise = 1;
break;
default:
usage();
} ARGEND;
if (argc < 1 || argc > 2)
usage();
if ((inf = !strcmp(argv[0], "inf"))) {
if (framewise)
usage();
einf_check_fd(STDOUT_FILENO, "<stdout>");
} else {
count = etozu_arg("the count", argv[0], 0, SIZE_MAX);
}
if (argv[1] && !strcmp(argv[1], "-"))
argv[1] = NULL;
eopen_stream(&stream, argv[1]);
if (stream.frames && count > SIZE_MAX / stream.frames)
eprintf("%s: video is too long\n", stream.file);
stream.frames *= count;
fprint_stream_head(stdout, &stream);
efflush(stdout, "<stdout>");
if (!argv[1]
? (framewise ? repeat_stdin_framewise() : repeat_stdin())
: (framewise ? repeat_regular_file_framewise(): repeat_regular_file()))
if (!inf || errno != EPIPE)
eprintf("write <stdout>:");
close(stream.fd);
return 0;
}
|
