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	blind-repeat.c - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
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	blind-repeat.c (2419B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include "common.h"
	3
	4 USAGE("([-f] count \| 'inf') [file]")
	5
	6 static size_t count = 0;
	7 static int inf;
	8 static struct stream stream;
	9
	10 static int
	11 repeat_regular_file(void)
	12 {
	13 stream.ptr = 0;
	14 while (inf \|\| count--) {
	15 fadvise_sequential(stream.fd, (off_t)(stream.headlen), 0…
	16 elseek(stream.fd, (off_t)(stream.headlen), SEEK_SET, str…
	17 if (esend_stream(&stream, STDOUT_FILENO, NULL))
	18 return -1;
	19 }
	20 return 0;
	21 }
	22
	23 static int
	24 repeat_regular_file_framewise(void)
	25 {
	26 size_t i;
	27 off_t off = (off_t)(stream.headlen);
	28 stream.ptr = 0;
	29 echeck_dimensions(&stream, WIDTH \| HEIGHT \| LENGTH, "input");
	30 for (;; off += (off_t)(stream.frame_size)) {
	31 for (i = 0; i < count; i++) {
	32 elseek(stream.fd, off, SEEK_SET, stream.file);
	33 if (!esend_frames(&stream, STDOUT_FILENO, 1, "<s…
	34 return 0;
	35 }
	36 }
	37 }
	38
	39 static int
	40 repeat_stdin(void)
	41 {
	42 size_t ptr = stream.ptr;
	43 size_t size = MAX(ptr, BUFSIZ);
	44 char *buf = memcpy(emalloc(size), stream.buf, ptr);
	45 egetfile(STDIN_FILENO, &buf, &ptr, &size, "<stdout>");
	46 while (inf \|\| count--)
	47 if (writeall(STDOUT_FILENO, buf, ptr))
	48 return free(buf), -1;
	49 return free(buf), 0;
	50 }
	51
	52 static int
	53 repeat_stdin_framewise(void)
	54 {
	55 char *buf;
	56 size_t i;
	57 echeck_dimensions(&stream, WIDTH \| HEIGHT, "input");
	58 buf = emalloc(stream.frame_size);
	59 while (eread_frame(&stream, buf))
	60 for (i = 0; i < count; i++)
	61 if (writeall(STDOUT_FILENO, buf, stream.frame_si…
	62 return free(buf), -1;
	63 return free(buf), 0;
	64 }
	65
	66 int
	67 main(int argc, char *argv[])
	68 {
	69 int framewise = 0;
	70
	71 ARGBEGIN {
	72 case 'f':
	73 framewise = 1;
	74 break;
	75 default:
	76 usage();
	77 } ARGEND;
	78
	79 if (argc < 1 \|\| argc > 2)
	80 usage();
	81
	82 if ((inf = !strcmp(argv[0], "inf"))) {
	83 if (framewise)
	84 usage();
	85 einf_check_fd(STDOUT_FILENO, "<stdout>");
	86 } else {
	87 count = etozu_arg("the count", argv[0], 0, SIZE_MAX);
	88 }
	89
	90 if (argv[1] && !strcmp(argv[1], "-"))
	91 argv[1] = NULL;
	92
	93 eopen_stream(&stream, argv[1]);
	94 if (stream.frames && count > SIZE_MAX / stream.frames)
	95 eprintf("%s: video is too long\n", stream.file);
	96 stream.frames *= count;
	97 fprint_stream_head(stdout, &stream);
	98 efflush(stdout, "<stdout>");
	99
	100 if (!argv[1]
	101 ? (framewise ? repeat_stdin_framewise() : repeat_stdin…
	102 : (framewise ? repeat_regular_file_framewise(): repeat_regul…
	103 if (!inf \|\| errno != EPIPE)
	104 eprintf("write <stdout>:");
	105
	106 close(stream.fd);
	107 return 0;
	108 }