getid3_lyrics3

20class getid3_lyrics3 extends getid3_handler21{22	/**23	 * @return bool24	 */25	public function Analyze() {26		$info = &$this->getid3->info;27 28		// http://www.volweb.cz/str/tags.htm29 30		if (!getid3_lib::intValueSupported($info['filesize'])) {31			$this->warning('Unable to check for Lyrics3 because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB');32			return false;33		}34 35		$this->fseek((0 - 128 - 9 - 6), SEEK_END);          // end - ID3v1 - "LYRICSEND" - [Lyrics3size]36		$lyrics3offset = null;37		$lyrics3version = null;38		$lyrics3size   = null;39		$lyrics3_id3v1 = $this->fread(128 + 9 + 6);40		$lyrics3lsz    = (int) substr($lyrics3_id3v1, 0, 6); // Lyrics3size41		$lyrics3end    = substr($lyrics3_id3v1,  6,   9); // LYRICSEND or LYRICS20042		$id3v1tag      = substr($lyrics3_id3v1, 15, 128); // ID3v143 44		if ($lyrics3end == 'LYRICSEND') {45			// Lyrics3v1, ID3v1, no APE46 47			$lyrics3size    = 5100;48			$lyrics3offset  = $info['filesize'] - 128 - $lyrics3size;49			$lyrics3version = 1;50 51		} elseif ($lyrics3end == 'LYRICS200') {52			// Lyrics3v2, ID3v1, no APE53 54			// LSZ = lyrics + 'LYRICSBEGIN'; add 6-byte size field; add 'LYRICS200'55			$lyrics3size    = $lyrics3lsz + 6 + strlen('LYRICS200');56			$lyrics3offset  = $info['filesize'] - 128 - $lyrics3size;57			$lyrics3version = 2;58 59		} elseif (substr(strrev($lyrics3_id3v1), 0, 9) == strrev('LYRICSEND')) {60			// Lyrics3v1, no ID3v1, no APE61 62			$lyrics3size    = 5100;63			$lyrics3offset  = $info['filesize'] - $lyrics3size;64			$lyrics3version = 1;65			$lyrics3offset  = $info['filesize'] - $lyrics3size;66 67		} elseif (substr(strrev($lyrics3_id3v1), 0, 9) == strrev('LYRICS200')) {68 69			// Lyrics3v2, no ID3v1, no APE70 71			$lyrics3size    = (int) strrev(substr(strrev($lyrics3_id3v1), 9, 6)) + 6 + strlen('LYRICS200'); // LSZ = lyrics + 'LYRICSBEGIN'; add 6-byte size field; add 'LYRICS200'72			$lyrics3offset  = $info['filesize'] - $lyrics3size;73			$lyrics3version = 2;74 75		} else {76 77			if (isset($info['ape']['tag_offset_start']) && ($info['ape']['tag_offset_start'] > 15)) {78 79				$this->fseek($info['ape']['tag_offset_start'] - 15);80				$lyrics3lsz = $this->fread(6);81				$lyrics3end = $this->fread(9);82 83				if ($lyrics3end == 'LYRICSEND') {84					// Lyrics3v1, APE, maybe ID3v185 86					$lyrics3size    = 5100;87					$lyrics3offset  = $info['ape']['tag_offset_start'] - $lyrics3size;88					$info['avdataend'] = $lyrics3offset;89					$lyrics3version = 1;90					$this->warning('APE tag located after Lyrics3, will probably break Lyrics3 compatability');91 92				} elseif ($lyrics3end == 'LYRICS200') {93					// Lyrics3v2, APE, maybe ID3v194 95					$lyrics3size    = $lyrics3lsz + 6 + strlen('LYRICS200'); // LSZ = lyrics + 'LYRICSBEGIN'; add 6-byte size field; add 'LYRICS200'96					$lyrics3offset  = $info['ape']['tag_offset_start'] - $lyrics3size;97					$lyrics3version = 2;98					$this->warning('APE tag located after Lyrics3, will probably break Lyrics3 compatability');99