# $1=value1, $2=value2, $3=threshold
# prints 0 if absolute difference between value1 and value2 is <= threshold
compare(){
- echo "scale=2; v = $1 - $2; if (v < 0) v = -v; if (v > $3) r = 1; r" | bc
+ awk "BEGIN { v=$1-$2; printf ((v<0?-v:v) > $3) }"
}
do_tiny_psnr(){