vendor/getid3/module.graphic.tiff.php

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

<?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.archive.tiff.php                                     //
// module for analyzing TIFF files                             //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

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

class getid3_tiff extends getid3_handler
{
	/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

		$this->fseek($info['avdataoffset']);
		$TIFFheader = $this->fread(4);

		switch (substr($TIFFheader, 0, 2)) {
			case 'II':
				$info['tiff']['byte_order'] = 'Intel';
				break;
			case 'MM':
				$info['tiff']['byte_order'] = 'Motorola';
				break;
			default:
				$this->error('Invalid TIFF byte order identifier ('.substr($TIFFheader, 0, 2).') at offset '.$info['avdataoffset']);
				return false;
		}

		$info['fileformat']          = 'tiff';
		$info['video']['dataformat'] = 'tiff';
		$info['video']['lossless']   = true;
		$info['tiff']['ifd']         = array();
		$CurrentIFD                  = array();

		$FieldTypeByteLength = array(1=>1, 2=>1, 3=>2, 4=>4, 5=>8);

		$nextIFDoffset = $this->TIFFendian2Int($this->fread(4), $info['tiff']['byte_order']);

		while ($nextIFDoffset > 0) {

			$CurrentIFD['offset'] = $nextIFDoffset;

			$this->fseek($info['avdataoffset'] + $nextIFDoffset);
			$CurrentIFD['fieldcount'] = $this->TIFFendian2Int($this->fread(2), $info['tiff']['byte_order']);