blind

suckless command-line video editing utility
git clone git://git.suckless.org/blind
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commit 8a2f7656c100fe9062782977ec5c82212d092ab9
parent 5c3968e6eda6583e9e2776be55e8d9af285e01a8
Author: Mattias Andrée <maandree@kth.se>
Date:   Fri, 14 Jul 2017 00:32:31 +0200

Add blind-mosaic-edges

Signed-off-by: Mattias Andrée <maandree@kth.se>

Diffstat:
Makefile | 1+
man/blind-mosaic-edges.1 | 12+++++-------
src/blind-mosaic-edges.c | 114+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 120 insertions(+), 7 deletions(-)

diff --git a/Makefile b/Makefile @@ -42,6 +42,7 @@ BIN =\ blind-linear-gradient\ blind-make-kernel\ blind-mosaic\ + blind-mosaic-edges\ blind-next-frame\ blind-norm\ blind-quaternion-product\ diff --git a/man/blind-mosaic-edges.1 b/man/blind-mosaic-edges.1 @@ -20,13 +20,11 @@ At the upper and lower edges of the video, wrap around to the opposite edges. .SH REQUIREMENTS .B blind-mosaic-edges -requires enough free memory to load one full row into -memory. A row requires 32 bytes per pixel it contains. -If -.B -x -is used, two full rows all be needed, and if -.B -y -is used, one full frame will be needed. +requires enough free memory to load one full frame into +memory and 1 bit per pixel on a frame. A frame requires +32 bytes per pixel it contains. +.B blind-mosaic-edges +is optimised for simplicity rather the memory usage. .SH SEE ALSO .BR blind (7), .BR blind-hexagon-tessellation (1), diff --git a/src/blind-mosaic-edges.c b/src/blind-mosaic-edges.c @@ -0,0 +1,114 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + +USAGE("[-xy]") + +int +main(int argc, char *argv[]) +{ + int tiled_x = 0; + int tiled_y = 0; + struct stream stream; + void *colours[2]; + char *buf; + char *edges; + char *here; + size_t i, n, x, y; + int v; + + ARGBEGIN { + case 'x': + tiled_x = 1; + break; + case 'y': + tiled_y = 1; + break; + default: + usage(); + } ARGEND; + + if (argc) + usage(); + + eopen_stream(&stream, NULL); + echeck_dimensions(&stream, WIDTH | HEIGHT, NULL); + + n = stream.width * stream.height; + buf = emalloc(stream.frame_size); + edges = emalloc((n + 7) / 8); + + colours[0] = alloca(stream.pixel_size); + colours[1] = alloca(stream.pixel_size); + memset(colours[0], 0, stream.pixel_size); + + if (!strcmp(stream.pixfmt, "xyza")) { + ((double *)(colours[1]))[0] = (double)1; + ((double *)(colours[1]))[1] = (double)1; + ((double *)(colours[1]))[2] = (double)1; + ((double *)(colours[1]))[3] = (double)1; + } else if (!strcmp(stream.pixfmt, "xyza f")) { + ((float *)(colours[1]))[0] = (float)1; + ((float *)(colours[1]))[1] = (float)1; + ((float *)(colours[1]))[2] = (float)1; + ((float *)(colours[1]))[3] = (float)1; + } else { + eprintf("pixel format %s is not supported, try xyza\n", stream.pixfmt); + } + + fprint_stream_head(stdout, &stream); + efflush(stdout, "<stdout>"); + + while (eread_frame(&stream, buf)) { + memset(edges, 0, (n + 7) / 8); + for (i = 0; i < n; i++) { + here = buf + i * stream.pixel_size; + x = i % stream.width; + y = i / stream.width; + + if (x != stream.width - 1 && + memcmp(here + stream.pixel_size, here, stream.pixel_size)) + goto at_edge; + + if (tiled_x && x == stream.width - 1 && + memcmp(here + stream.pixel_size - stream.row_size, here, stream.pixel_size)) + goto at_edge; + + if (x && + memcmp(here - stream.pixel_size, here, stream.pixel_size)) + goto at_edge; + + if (tiled_x && !x && + memcmp(here + stream.row_size - stream.pixel_size, here, stream.pixel_size)) + goto at_edge; + + if (y != stream.height - 1 && + memcmp(here + stream.row_size, here, stream.pixel_size)) + goto at_edge; + + if (tiled_y && y == stream.height - 1 && + memcmp(here + stream.row_size - stream.frame_size, here, stream.pixel_size)) + goto at_edge; + + if (y && + memcmp(here - stream.row_size, here, stream.pixel_size)) + goto at_edge; + + if (tiled_y && !y && + memcmp(here + stream.frame_size - stream.row_size, here, stream.pixel_size)) + goto at_edge; + + continue; + at_edge: + edges[i >> 3] |= 1 << (i & 7); + } + for (i = 0; i < n; i++) { + v = (edges[i >> 3] >> (i & 7)) & 1; + memcpy(buf + i * stream.pixel_size, colours[v], stream.pixel_size); + } + ewriteall(STDOUT_FILENO, buf, stream.frame_size, "<stdout>"); + } + + free(buf); + free(edges); + return 0; +}