vendor/getid3/module.audio.bonk.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.audio.la.php                                         //
// module for analyzing BONK audio files                       //
// dependencies: module.tag.id3v2.php (optional)               //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}

class getid3_bonk extends getid3_handler
{
	/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

		// shortcut
		$info['bonk'] = array();
		$thisfile_bonk        = &$info['bonk'];

		$thisfile_bonk['dataoffset'] = $info['avdataoffset'];
		$thisfile_bonk['dataend']    = $info['avdataend'];

		if (!getid3_lib::intValueSupported($thisfile_bonk['dataend'])) {

			$this->warning('Unable to parse BONK file from end (v0.6+ preferred method) because PHP filesystem functions only support up to '.round(PHP_INT_MAX / 1073741824).'GB');

		} else {

			// scan-from-end method, for v0.6 and higher
			$this->fseek($thisfile_bonk['dataend'] - 8);
			$PossibleBonkTag = $this->fread(8);
			while ($this->BonkIsValidTagName(substr($PossibleBonkTag, 4, 4), true)) {
				$BonkTagSize = getid3_lib::LittleEndian2Int(substr($PossibleBonkTag, 0, 4));
				$this->fseek(0 - $BonkTagSize, SEEK_CUR);
				$BonkTagOffset = $this->ftell();
				$TagHeaderTest = $this->fread(5);
				if (($TagHeaderTest[0] != "\x00") || (substr($PossibleBonkTag, 4, 4) != strtolower(substr($PossibleBonkTag, 4, 4)))) {
					$this->error('Expecting "'.getid3_lib::PrintHexBytes("\x00".strtoupper(substr($PossibleBonkTag, 4, 4))).'" at offset '.$BonkTagOffset.', found "'.getid3_lib::PrintHexBytes($TagHeaderTest).'"');
					return false;
				}
				$BonkTagName = substr($TagHeaderTest, 1, 4);

				$thisfile_bonk[$BonkTagName]['size']   = $BonkTagSize;
				$thisfile_bonk[$BonkTagName]['offset'] = $BonkTagOffset;
				$this->HandleBonkTags($BonkTagName);
				$NextTagEndOffset = $BonkTagOffset - 8;
				if ($NextTagEndOffset < $thisfile_bonk['dataoffset']) {