blind

suckless command-line video editing utility
git clone git://git.suckless.org/blind
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commit 975a02fba76fce7526278ea09a27cc0aae608d30
parent 6f4d55793f88540d1b1abd7410e43da83993ad6a
Author: Mattias Andrée <maandree@kth.se>
Date:   Wed, 12 Jul 2017 02:09:03 +0200

Add blind-get-colours

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

Diffstat:
Makefile | 1+
README | 3+++
man/blind-get-colours.1 | 15+++++++++++++++
man/blind-repeat-tessellation.1 | 3++-
man/blind.7 | 3+++
src/blind-get-colours.c | 88+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 112 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile @@ -33,6 +33,7 @@ BIN =\ blind-from-text\ blind-from-video\ blind-gauss-blur\ + blind-get-colours\ blind-interleave\ blind-invert-luma\ blind-linear-gradient\ diff --git a/README b/README @@ -99,6 +99,9 @@ UTILITIES blind-gauss-blur(1) Apply Gaussian blur to a video + blind-get-colours(1) + Get a frame with all colours from a video + blind-interleave(1) Framewise interleave videos diff --git a/man/blind-get-colours.1 b/man/blind-get-colours.1 @@ -0,0 +1,15 @@ +.TH BLIND-GET-COLOURS 1 blind +.SH NAME +blind-get-colours - Get a frame with all colours from a video +.SH SYNOPSIS +.B blind-get-colours +.SH DESCRIPTION +.B blind-get-colours +reads a video from stdin and prints a single-frame +video to stdout contain all colours from the video. +.SH SEE ALSO +.BR blind (7), +.BR blind-repeat-tessellation (1) +.SH AUTHORS +Mattias Andrée +.RI < maandree@kth.se > diff --git a/man/blind-repeat-tessellation.1 b/man/blind-repeat-tessellation.1 @@ -28,7 +28,8 @@ requires enough free memory to load one full frame of the video from stdin into memory. A frame requires 32 bytes per pixel it contains. .SH SEE ALSO -.BR blind (7) +.BR blind (7), +.BR blind-get-colours (1) .SH AUTHORS Mattias Andrée .RI < maandree@kth.se > diff --git a/man/blind.7 b/man/blind.7 @@ -115,6 +115,9 @@ Converts a regular, cooked video to a blind video .BR blind-gauss-blur (1) Apply Gaussian blur to a video .TP +.BR blind-get-colours (1) +Get a frame with all colours from a video +.TP .BR blind-interleave (1) Framewise interleave videos .TP diff --git a/src/blind-get-colours.c b/src/blind-get-colours.c @@ -0,0 +1,88 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + +USAGE("") + + +static size_t width; + + +static int +pixcmp(const void *a, const void *b) +{ + return memcmp(a, b, width); +} + + +static size_t +unique(char *base, size_t n) +{ + size_t i, r = 1; + for (i = 1; i < n; i++) + if (pixcmp(base + (r - 1) * width, base + i * width) && r++ != i) + memcpy(base + (r - 1) * width, base + i * width, width); + return r; +} + + +static size_t +merge(char **sink, size_t n, char *new, size_t m, size_t *siz) +{ + size_t i, j; + int c; + for (i = j = 0; i < n && j < m; i++) { + c = pixcmp(*sink + i * width, new + j * width); + if (c > 0) { + if (n == *siz) { + *siz = n ? n * 2 : 8; + *sink = erealloc2(*sink, *siz, width); + } + n += 1; + memmove(*sink + (i + 1) * width, *sink + i * width, (n - i - 1) * width); + memcpy(*sink + i * width, new + j * width, width); + } + j += c >= 0; + } + m -= j; + if (n + m > *siz) { + *siz = n + m; + *sink = erealloc2(*sink, *siz, width); + } + memcpy(*sink + n * width, new + j * width, m * width); + return n + m; +} + + +int +main(int argc, char *argv[]) +{ + struct stream stream; + char *colours = NULL; + size_t ptr = 0, siz = 0; + size_t n, m; + + UNOFLAGS(argc); + + eopen_stream(&stream, NULL); + width = stream.pixel_size; + + do { + n = stream.ptr / width; + + qsort(stream.buf, n, width, pixcmp); + m = unique(stream.buf, n); + ptr = merge(&colours, ptr, stream.buf, m, &siz); + + n *= width; + memmove(stream.buf, stream.buf + n, stream.ptr -= n); + } while (eread_stream(&stream, SIZE_MAX)); + + stream.frames = 1; + stream.width = ptr; + stream.height = 1; + fprint_stream_head(stdout, &stream); + efflush(stdout, "<stdout>"); + ewriteall(STDOUT_FILENO, colours, ptr * width, "<stdout>"); + + return 0; +}