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<?php

/*
 * This file is part of PHP-FFmpeg.
 *
 * (c) Alchemy <info@alchemy.fr>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace FFMpeg\Filters\Audio;

use FFMpeg\Filters\Audio\AudioFilterInterface;
use FFMpeg\Format\AudioInterface;
use FFMpeg\Media\Audio;

class AddMetadataFilter implements AudioFilterInterface
{
        /** @var Array */
        private $metaArr;
        /** @var Integer */
        private $priority;

        function __construct($metaArr = null, $priority = 9)
        {
                $this->metaArr = $metaArr;
                $this->priority = $priority;
        }

        public function getPriority()
        {
                //must be of high priority in case theres a second input stream (artwork) to register with audio
                return $this->priority;
        }

        public function apply(Audio $audio, AudioInterface $format)
        {
                $meta = $this->metaArr;

                if (is_null($meta)) {
                        return ['-map_metadata', '-1', '-vn'];
                }

                $metadata = [];

                if (array_key_exists("artwork", $meta)) {
                        array_push($metadata, "-i", $meta['artwork'], "-map", "0", "-map", "1");
                        unset($meta['artwork']);
                }

                foreach ($meta as $k => $v) {
                        array_push($metadata, "-metadata", "$k=$v");
                }

                return $metadata;
        }
}