GopherProxy

	blind-mosaic-corners.c - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
	Log
	Files
	Refs
	README
	LICENSE
	---
	blind-mosaic-corners.c (3095B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include "common.h"
	3
	4 USAGE("[-xy]")
	5
	6 static size_t pixsize;
	7
	8 static int
	9 pixcmp(const void a, const void b)
	10 {
	11 return memcmp(a, b, pixsize);
	12 }
	13
	14 static size_t
	15 count_unique(char *base, size_t n)
	16 {
	17 size_t ret = 1, i;
	18 qsort(base, n, pixsize, pixcmp);
	19 for (i = 1; i < n; i++)
	20 ret += !!memcmp(base + (i - 1) * pixsize, base + i * pix…
	21 return ret;
	22 }
	23
	24 int
	25 main(int argc, char *argv[])
	26 {
	27 int tiled_x = 0;
	28 int tiled_y = 0;
	29 struct stream stream;
	30 void *colours[2];
	31 char buf, corners, here, found;
	32 ssize_t dl, dr, du, dd;
	33 size_t i, j, n, x, y;
	34 int v;
	35
	36 ARGBEGIN {
	37 case 'x':
	38 tiled_x = 1;
	39 break;
	40 case 'y':
	41 tiled_y = 1;
	42 break;
	43 default:
	44 usage();
	45 } ARGEND;
	46
	47 if (argc)
	48 usage();
	49
	50 eopen_stream(&stream, NULL);
	51 echeck_dimensions(&stream, WIDTH \| HEIGHT, NULL);
	52
	53 n = stream.width * stream.height;
	54 buf = emalloc(stream.frame_size);
	55 corners = emalloc((n + 7) / 8);
	56
	57 found = alloca(9 * stream.pixel_size);
	58 colours[0] = alloca(stream.pixel_size);
	59 colours[1] = alloca(stream.pixel_size);
	60 memset(colours[0], 0, stream.pixel_size);
	61
	62 if (stream.encoding == DOUBLE) {
	63 ((double *)(colours[1]))[0] = (double)1;
	64 ((double *)(colours[1]))[1] = (double)1;
	65 ((double *)(colours[1]))[2] = (double)1;
	66 ((double *)(colours[1]))[3] = (double)1;
	67 } else if (stream.encoding == FLOAT) {
	68 ((float *)(colours[1]))[0] = (float)1;
	69 ((float *)(colours[1]))[1] = (float)1;
	70 ((float *)(colours[1]))[2] = (float)1;
	71 ((float *)(colours[1]))[3] = (float)1;
	72 } else {
	73 eprintf("pixel format %s is not supported, try xyza\n", …
	74 }
	75
	76 fprint_stream_head(stdout, &stream);
	77 efflush(stdout, "<stdout>");
	78
	79 pixsize = stream.pixel_size;
	80 while (eread_frame(&stream, buf)) {
	81 memset(corners, 0, (n + 7) / 8);
	82 for (i = 0; i < n; i++) {
	83 here = buf + i * pixsize;
	84 x = i % stream.width;
	85 y = i / stream.width;
	86 j = 1;
	87 memcpy(found, here, pixsize);
	88
	89 dr = (ssize_t)(x != stream.width - 1 ? pixsize :…
	90 dl = (ssize_t)(x ? -pixsize : tiled_x ? stream.r…
	91 dd = (ssize_t)(y != stream.height - 1 ? stream.r…
	92 du = (ssize_t)(y ? -stream.row_size : tiled_y ? …
	93
	94 memcpy(found + j++ * pixsize, here + dr, pixsize…
	95 memcpy(found + j++ * pixsize, here + dl, pixsize…
	96 memcpy(found + j++ * pixsize, here + dd, pixsize…
	97 memcpy(found + j++ * pixsize, here + du, pixsize…
	98 memcpy(found + j++ * pixsize, here + dr + du, pi…
	99 memcpy(found + j++ * pixsize, here + dl + du, pi…
	100 memcpy(found + j++ * pixsize, here + dr + dd, pi…
	101 memcpy(found + j++ * pixsize, here + dl + dd, pi…
	102
	103 if (j > 2 && count_unique(found, j) > 2)
	104 corners[i >> 3] \|= (char)(1 << (i & 7));
	105 }
	106 for (i = 0; i < n; i++) {
	107 v = (corners[i >> 3] >> (i & 7)) & 1;
	108 memcpy(buf + i * pixsize, colours[v], pixsize);
	109 }
	110 ewriteall(STDOUT_FILENO, buf, stream.frame_size, "<stdou…
	111 }
	112
	113 free(buf);
	114 free(corners);
	115 return 0;
	116 }