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vendor/miljar/php-exif/lib/PHPExif/Adapter/Exiftool.php
vendored
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202
vendor/miljar/php-exif/lib/PHPExif/Adapter/Exiftool.php
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<?php
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/**
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* PHP Exif Exiftool Reader Adapter
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*
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* @link http://github.com/miljar/PHPExif for the canonical source repository
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* @copyright Copyright (c) 2013 Tom Van Herreweghe <tom@theanalogguy.be>
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* @license http://github.com/miljar/PHPExif/blob/master/LICENSE MIT License
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* @category PHPExif
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* @package Reader
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*/
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namespace PHPExif\Adapter;
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use PHPExif\Exif;
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use InvalidArgumentException;
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use RuntimeException;
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/**
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* PHP Exif Exiftool Reader Adapter
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*
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* Uses native PHP functionality to read data from a file
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*
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* @category PHPExif
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* @package Reader
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*/
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class Exiftool extends AdapterAbstract
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{
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const TOOL_NAME = 'exiftool';
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/**
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* Path to the exiftool binary
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*
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* @var string
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*/
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protected $toolPath;
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/**
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* @var boolean
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*/
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protected $numeric = true;
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/**
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* @var array
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*/
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protected $encoding = array();
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/**
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* @var string
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*/
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protected $mapperClass = '\\PHPExif\\Mapper\\Exiftool';
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/**
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* Setter for the exiftool binary path
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*
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* @param string $path The path to the exiftool binary
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* @return \PHPExif\Adapter\Exiftool Current instance
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* @throws \InvalidArgumentException When path is invalid
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*/
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public function setToolPath($path)
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{
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if (!file_exists($path)) {
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throw new InvalidArgumentException(
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sprintf(
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'Given path (%1$s) to the exiftool binary is invalid',
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$path
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)
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);
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}
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$this->toolPath = $path;
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return $this;
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}
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/**
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* @param boolean $numeric
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*/
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public function setNumeric($numeric)
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{
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$this->numeric = $numeric;
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}
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/**
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* @see http://www.sno.phy.queensu.ca/~phil/exiftool/faq.html#Q10
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* @param array $encoding encoding parameters in an array eg. ["exif" => "UTF-8"]
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*/
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public function setEncoding($encoding)
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{
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$possible_keys = array("exif", "iptc", "id3", "photoshop", "quicktime",);
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$possible_values = array("UTF8", "cp65001", "UTF-8", "Thai", "cp874", "Latin", "cp1252",
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"Latin1", "MacRoman", "cp10000", "Mac", "Roman", "Latin2", "cp1250", "MacLatin2",
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"cp10029", "Cyrillic", "cp1251", "Russian", "MacCyrillic", "cp10007", "Greek",
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"cp1253", "MacGreek", "cp10006", "Turkish", "cp1254", "MacTurkish", "cp10081",
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"Hebrew", "cp1255", "MacRomanian", "cp10010", "Arabic", "cp1256", "MacIceland",
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"cp10079", "Baltic", "cp1257", "MacCroatian", "cp10082", "Vietnam", "cp1258",);
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foreach ($encoding as $type => $encoding) {
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if (in_array($type, $possible_keys) && in_array($encoding, $possible_values)) {
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$this->encoding[$type] = $encoding;
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}
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}
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}
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/**
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* Getter for the exiftool binary path
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* Lazy loads the "default" path
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*
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* @return string
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*/
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public function getToolPath()
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{
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if (empty($this->toolPath)) {
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$path = exec('which ' . self::TOOL_NAME);
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$this->setToolPath($path);
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}
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return $this->toolPath;
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}
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/**
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* Reads & parses the EXIF data from given file
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*
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* @param string $file
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* @return \PHPExif\Exif Instance of Exif object with data
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* @throws \RuntimeException If the EXIF data could not be read
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*/
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public function getExifFromFile($file)
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{
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$encoding = '';
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if (!empty($this->encoding)) {
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$encoding = '-charset ';
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foreach ($this->encoding as $key => $value) {
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$encoding .= escapeshellarg($key).'='.escapeshellarg($value);
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}
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}
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$result = $this->getCliOutput(
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sprintf(
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'%1$s%3$s -j -a -G1 %5$s -c %4$s %2$s',
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$this->getToolPath(),
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escapeshellarg($file),
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$this->numeric ? ' -n' : '',
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escapeshellarg('%d deg %d\' %.4f"'),
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$encoding
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)
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);
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if (!mb_check_encoding($result, "utf-8")) {
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$result = utf8_encode($result);
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}
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$data = json_decode($result, true);
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if (!is_array($data)) {
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throw new RuntimeException(
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'Could not decode exiftool output'
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);
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}
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// map the data:
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$mapper = $this->getMapper();
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$mapper->setNumeric($this->numeric);
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$mappedData = $mapper->mapRawData(reset($data));
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// hydrate a new Exif object
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$exif = new Exif();
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$hydrator = $this->getHydrator();
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$hydrator->hydrate($exif, $mappedData);
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$exif->setRawData(reset($data));
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return $exif;
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}
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/**
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* Returns the output from given cli command
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*
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* @param string $command
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* @return mixed
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* @throws RuntimeException If the command can't be executed
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*/
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protected function getCliOutput($command)
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{
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$descriptorspec = array(
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0 => array('pipe', 'r'),
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1 => array('pipe', 'w'),
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2 => array('pipe', 'a')
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);
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$process = proc_open($command, $descriptorspec, $pipes);
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if (!is_resource($process)) {
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throw new RuntimeException(
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'Could not open a resource to the exiftool binary'
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);
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}
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$result = stream_get_contents($pipes[1]);
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fclose($pipes[0]);
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fclose($pipes[1]);
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fclose($pipes[2]);
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proc_close($process);
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return $result;
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}
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}
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