#!/usr/bin/env bash

#
# Non ho responsabilità sulla qualità del codice
# lo script non è mio, mi sono limitato a renderlo
# funzionante
#
# Talebian
#

recover(){
    rm /dev/video0
    mv /dev/video69 /dev/video0
    exit
}


if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 
   exit 1
fi

modprobe v4l2loopback exclusive_caps=1

trap recover SIGINT

TMPHOME=$(pwd)

mv /dev/video0 /dev/video69 #nice

fakecam=$( v4l2-ctl --list-devices | grep Dummy -A 1 | grep /dev/video | sed 's/\t//g' | sed 's/[/]dev[/]//' )

cd /dev
ln -s $fakecam video0

cd $TMPHOME

case $1 in
"pic")
    if [ -f $2 ]
    then
    ffmpeg -loop 1 -re -i $2 -f v4l2 -vcodec rawvideo -pix_fmt yuv420p /dev/video0
    else
        echo "File does not exists"
    fi;;
    
"vid")
    if [ -d $2 ]
    then
        cd $2
        while [ 1 ]
        do
            for file in *.mp4; do ffmpeg -re -i "$file" -map 0:v -f v4l2 /dev/video0; done
            for file in *.mkv; do ffmpeg -re -i "$file" -map 0:v -f v4l2 /dev/video0; done
            for file in *.webm; do ffmpeg -re -i "$file" -map 0:v -f v4l2 /dev/video0; done
        done
    else
        echo "Directory does not exists"
    fi;;
*)
    echo """Usage:
pic <picture_file>
or
vid <videos_directory>""";;

esac

recover