/**
* Extracts a ratio from a string in a \d+:\d+ format given a key name.
*
* @param Stream $stream The stream where to look for the ratio.
* @param string $name the name of the key.
* @return null|array An array containing the width and the height, null if not found.
*/
private function extractRatio(Stream $stream, $name)
{
if ($stream->has($name)) {
$ratio = $stream->get($name);
if (preg_match('/\\d+:\\d+/', $ratio)) {
$data = array_filter(explode(':', $ratio), function ($int) {
return $int > 0;
});
if (2 === count($data)) {
return array_map(function ($int) {
return (int) $int;
}, $data);
}
}
}
return null;
}
