vendor/getid3/module.tag.lyrics3.php

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<?php

/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at https://github.com/JamesHeinrich/getID3       //
//            or https://www.getid3.org                        //
//            or http://getid3.sourceforge.net                 //
//  see readme.txt for more details                            //
/////////////////////////////////////////////////////////////////
///                                                            //
// module.tag.lyrics3.php                                      //
// module for analyzing Lyrics3 tags                           //
// dependencies: module.tag.apetag.php (optional)              //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}
class getid3_lyrics3 extends getid3_handler
{
	/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

		// http://www.volweb.cz/str/tags.htm

		if (!getid3_lib::intValueSupported($info['filesize'])) {
			$this->warning('Unable to check for Lyrics3 because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB');
			return false;
		}

		$this->fseek((0 - 128 - 9 - 6), SEEK_END);          // end - ID3v1 - "LYRICSEND" - [Lyrics3size]
		$lyrics3_id3v1 = $this->fread(128 + 9 + 6);
		$lyrics3lsz    = (int) substr($lyrics3_id3v1, 0, 6); // Lyrics3size
		$lyrics3end    = substr($lyrics3_id3v1,  6,   9); // LYRICSEND or LYRICS200
		$id3v1tag      = substr($lyrics3_id3v1, 15, 128); // ID3v1

		if ($lyrics3end == 'LYRICSEND') {
			// Lyrics3v1, ID3v1, no APE

			$lyrics3size    = 5100;
			$lyrics3offset  = $info['filesize'] - 128 - $lyrics3size;
			$lyrics3version = 1;

		} elseif ($lyrics3end == 'LYRICS200') {
			// Lyrics3v2, ID3v1, no APE

			// LSZ = lyrics + 'LYRICSBEGIN'; add 6-byte size field; add 'LYRICS200'
			$lyrics3size    = $lyrics3lsz + 6 + strlen('LYRICS200');
			$lyrics3offset  = $info['filesize'] - 128 - $lyrics3size;
			$lyrics3version = 2;

		} elseif (substr(strrev($lyrics3_id3v1), 0, 9) == strrev('LYRICSEND')) {
			// Lyrics3v1, no ID3v1, no APE

			$lyrics3size    = 5100;
			$lyrics3offset  = $info['filesize'] - $lyrics3size;