allenk

/*
 *  V4L2 video capture example
 *
 *  This program can be used and distributed without restrictions.
 *
 *      This program is provided with the V4L2 API
 * see http://linuxtv.org/docs.php for more information
 */

#include <stdio.h>

allenk

(Written as a way to stop forgetting these things. 
May be wrong sometimes, as it's just the result of my research here and there. 
If it helps you, give me a shout!)   

Ordered dithering is a technique used to reduce - deliberately! - the precision of an image.
Motivation : artistic (mainly ?), color quantization --> reduce the number of color in an image

----------------------------------------------------------------
INTRODUCTION

allenk

Encoding Video

Installing

Install FFmpeg with homebrew. You'll need to install it with a couple flags for webm and the AAC audio codec.

brew install ffmpeg --with-libvpx --with-libvorbis --with-fdk-aac --with-opus

allenk

/********************************************************************
*                                                                   *
*                    Curve Rasterizing Algorithm                    *
*                                                                   *
********************************************************************/

/**
 * @author Zingl Alois
 * @date 22.08.2016
 * @version 1.2

allenk

// MSVC apparently doesn't have C's getline
// This is a poor man's implementation of it using fgets.
// See the man page at
// http://pubs.opengroup.org/onlinepubs/9699919799/functions/getdelim.html
size_t getline(char** buf, size_t* bufLen, FILE* f)
{
	if (buf == nullptr || bufLen == nullptr)
	{
		errno = EINVAL;
		return -1;

allenk

/**
 * Bresenham Curve Rasterizing Algorithms
 * @author  Zingl Alois
 * @date    17.12.2014
 * @version 1.3
 * @url     http://members.chello.at/easyfilter/bresenham.html
*/

function assert(a) {
   if (!a) console.log("Assertion failed in bresenham.js "+a);

allenk

#define STB_IMAGE_IMPLEMENTATION
#define STB_IMAGE_WRITE_IMPLEMENTATION
#define STBI_ONLY_PNG
#define STBI_ONLY_JPEG
#define STBI_ONLY_BMP
#define STBI_ONLY_GIF

#include "stb_image.h"
#include "stb_image_write.h"

allenk

urlencode() {
    # urlencode <string>
    old_lc_collate=$LC_COLLATE
    LC_COLLATE=C
    
    local length="${#1}"
    for (( i = 0; i < length; i++ )); do
        local c="${1:i:1}"
        case $c in
            [a-zA-Z0-9.~_-]) printf "$c" ;;

allenk

#!/bin/bash

# Usage: slackpost <token> <channel> <message>

# Enter the name of your slack host here - the thing that appears in your URL:
# https://slackhost.slack.com/
slackhost=PUT_YOUR_HOST_HERE

token=$1

allenk

Free O'Reilly books and convenient script to just download them.

Thanks /u/FallenAege/ and /u/ShPavel/ from this Reddit post

How to use:

1. Take the download.sh file and put it into a directory where you want the files to be saved.
2. cd into the directory and make sure that it has executable permissions (chmod +x download.sh should do it)
3. Run ./download.sh and wee there it goes. Also if you do not want all the files, just simply comment the ones you do not want.