sw2sw

#!/bin/bash
reoder(){ echo "${1:6:2}${1:4:2}${1:2:2}${1:0:2}"; }
numtooff(){
echo -n "00000000$(printf '%x' "$1")" | tail -c 8
}
num2(){
echo -n "00000000$(printf '%x' "$1")" | tail -c 2 | tr '[:lower:]' '[:upper:]'
}
4bb(){
echo $((0x$(reoder "$(head -c $1 "$file" | tail -c 4 | xxd -p)")))

}


swar2swav(){
file="$1"
out="$2"
samplecount=$(4bb 60)
echo $samplecount
for i in $(seq 1 $samplecount)
do
if [ $i != $samplecount ]
then
tmp=$(4bb $((60+((i+1)*4))))
else
tmp=$(wc -c <"$file")
fi
tmp2=$(4bb $((60+(i*4))))

echo $tmp $((tmp-tmp2))

echo "53574156 fffe0001 $(reoder $(numtooff $(((tmp-tmp2)+24)))) 10000100 44415441 $(reoder $(numtooff $(((tmp-tmp2)+8))))" | xxd -r -p >"$out/$(num2 $((i-1))).swav"
cat "$file" | head -c $tmp | tail -c $((tmp-tmp2)) >> "$out/$(num2 $((i-1))).swav"


done
}
# swar2swav "$1" "$2"

swav2swar(){
dir="$(realpath "$1")"
out="$2"
samplecount="$(ls -1 "$dir" | wc -l)"
headersize="$((60+(samplecount*4)))"

echo "$1" "$2"
echo $samplecount $headersize


add=
buf=$headersize
buff=
for i in $(seq 0 $(($samplecount-1)))
do
size=$(($(wc -c <"$dir/$(num2 $i).swav")-24))
buff="$buff"" $(reoder $(numtooff $buf))"
buf="$((buf+size))"


add=$((add+$size))


done
filesize=$(((add+$headersize)))
bottonsize=$(((add+($headersize-16))))
echo "53574152 fffe0001 $(reoder $(numtooff $filesize)) 10000100 44415441 $(reoder $(numtooff $bottonsize)) 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 $(reoder $(numtooff $samplecount))$buff" | xxd -r -p >"$out"

for i in $(seq 0 $(($samplecount-1)))
do
# echo $(num2 $i)
size=$(($(wc -c <"$dir/$(num2 $i).swav")-24))
tail -c $size "$dir/$(num2 $i).swav" >>"$out"

done


}




















# if [ "$1" = "-u" ]
# then
# swar2swav "$2" "$3"
# else
# swav2swar "$1" "$2"
# fi