streams/Zotlabs/Thumbs/Mp3audio.php

<?php

namespace Zotlabs\Thumbs;

require_once('library/php-id3/PhpId3/Id3TagsReader.php');
require_once('library/php-id3/PhpId3/BinaryFileReader.php');
require_once('library/php-id3/PhpId3/Id3Tags.php');

use PhpId3\Id3TagsReader;

class Mp3audio {

	function Match($type) {
		return(($type === 'audio/mpeg') ? true : false );
	}

	function Thumb($attach,$preview_style,$height = 300, $width = 300) {

		$fh = @fopen(dbunescbin($attach['content']),'rb');
		if ($fh === false) {
			return;
		}
		$id3 = new Id3TagsReader($fh);
		$id3->readAllTags();

		$image = $id3->getImage(); 
		if (is_array($image)) {
			$photo = $image[1];
		}

		fclose($fh);
		
        if ($photo) {
			$image = imagecreatefromstring($photo);
			$dest = imagecreatetruecolor( $width, $height );
	        $srcwidth = imagesx($image);
    	    $srcheight = imagesy($image);

        	imagealphablending($dest, false);
			imagesavealpha($dest, true);
        	imagecopyresampled($dest, $image, 0, 0, 0, 0, $width, $height, $srcwidth, $srcheight);
            imagedestroy($image);
			imagejpeg($dest,dbunescbin($attach['content']) . '.thumb');
		}
	}
}