getid3_apetag::Analyze(): bool

38	public function Analyze() {39		$info = &$this->getid3->info;40 41		if (!getid3_lib::intValueSupported($info['filesize'])) {42			$this->warning('Unable to check for APEtags because file is larger than '.round(PHP_INT_MAX / 1073741824).'GB');43			return false;44		}45		if (PHP_INT_MAX == 2147483647) {46			// https://github.com/JamesHeinrich/getID3/issues/43947			$this->warning('APEtag flags may not be parsed correctly on 32-bit PHP');48		}49 50		$id3v1tagsize     = 128;51		$apetagheadersize = 32;52		$lyrics3tagsize   = 10;53 54		if ($this->overrideendoffset == 0) {55 56			$this->fseek(0 - $id3v1tagsize - $apetagheadersize - $lyrics3tagsize, SEEK_END);57			$APEfooterID3v1 = $this->fread($id3v1tagsize + $apetagheadersize + $lyrics3tagsize);58 59			//if (preg_match('/APETAGEX.{24}TAG.{125}$/i', $APEfooterID3v1)) {60			if (substr($APEfooterID3v1, strlen($APEfooterID3v1) - $id3v1tagsize - $apetagheadersize, 8) == 'APETAGEX') {61 62				// APE tag found before ID3v163				$info['ape']['tag_offset_end'] = $info['filesize'] - $id3v1tagsize;64 65			//} elseif (preg_match('/APETAGEX.{24}$/i', $APEfooterID3v1)) {66			} elseif (substr($APEfooterID3v1, strlen($APEfooterID3v1) - $apetagheadersize, 8) == 'APETAGEX') {67 68				// APE tag found, no ID3v169				$info['ape']['tag_offset_end'] = $info['filesize'];70 71			}72 73		} else {74 75			$this->fseek($this->overrideendoffset - $apetagheadersize);76			if ($this->fread(8) == 'APETAGEX') {77				$info['ape']['tag_offset_end'] = $this->overrideendoffset;78			}79 80		}81		if (!isset($info['ape']['tag_offset_end'])) {82 83			// APE tag not found84			unset($info['ape']);85			return false;86 87		}88 89		// shortcut90		$thisfile_ape = &$info['ape'];91 92		$this->fseek($thisfile_ape['tag_offset_end'] - $apetagheadersize);93		$APEfooterData = $this->fread(32);94		if (!($thisfile_ape['footer'] = $this->parseAPEheaderFooter($APEfooterData))) {95			$this->error('Error parsing APE footer at offset '.$thisfile_ape['tag_offset_end']);96			return false;97		}98 99		if (isset($thisfile_ape['footer']['flags']['header']) && $thisfile_ape['footer']['flags']['header']) {100			$this->fseek($thisfile_ape['tag_offset_end'] - $thisfile_ape['footer']['raw']['tagsize'] - $apetagheadersize);101			$thisfile_ape['tag_offset_start'] = $this->ftell();102			$APEtagData = $this->fread($thisfile_ape['footer']['raw']['tagsize'] + $apetagheadersize);103		} else {104			$thisfile_ape['tag_offset_start'] = $thisfile_ape['tag_offset_end'] - $thisfile_ape['footer']['raw']['tagsize'];105			$this->fseek($thisfile_ape['tag_offset_start']);106			$APEtagData = $this->fread($thisfile_ape['footer']['raw']['tagsize']);107		}108		$info['avdataend'] = $thisfile_ape['tag_offset_start'];109 110		if (isset($info['id3v1']['tag_offset_start']) && ($info['id3v1']['tag_offset_start'] < $thisfile_ape['tag_offset_end'])) {111			$this->warning('ID3v1 tag information ignored since it appears to be a false synch in APEtag data');112			unset($info['id3v1']);113			foreach ($info['warning'] as $key => $value) {114				if ($value == 'Some ID3v1 fields do not use NULL characters for padding') {115					unset($info['warning'][$key]);116					sort($info['warning']);117					break;