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<?php
/*
* This file is part of PHP-FFmpeg.
*
* (c) Alchemy <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace FFMpeg\Filters;
class FiltersCollection implements \Countable, \IteratorAggregate
{
private $sorted;
private $filters = array();
/**
* @param FilterInterface $filter
*
* @return FiltersCollection
*/
public function add(FilterInterface $filter)
{
$this->filters[$filter->getPriority()][] = $filter;
$this->sorted = null;
return $this;
}
/**
* {@inheritdoc}
*/
public function count()
{
if (0 === count($this->filters)) {
return 0;
}
return count(call_user_func_array('array_merge', array_values($this->filters)));
}
/**
* {@inheritdoc}
*/
public function getIterator()
{
if (null === $this->sorted) {
if (0 === count($this->filters)) {
$this->sorted = $this->filters;
} else {
krsort($this->filters);
$this->sorted = call_user_func_array('array_merge', array_values($this->filters));
}
}
return new \ArrayIterator($this->sorted);
}
}