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<?php |
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namespace Mhor\MediaInfo\Runner; |
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use Symfony\Component\Process\Process; |
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class MediaInfoCommandRunner |
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{ |
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/** |
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* @var string |
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*/ |
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protected $filePath; |
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/** |
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* @var Process |
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*/ |
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protected $process; |
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/** |
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* @var string |
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*/ |
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protected $command = 'mediainfo'; |
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/** |
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* @var array |
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*/ |
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protected $arguments = ['--OUTPUT=XML', '-f']; |
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/** |
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* @param string $filePath |
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* @param array $arguments |
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* @param Process $process |
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*/ |
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public function __construct( |
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$filePath, |
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$command = null, |
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array $arguments = null, |
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Process $process = null |
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) { |
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$this->filePath = $filePath; |
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if ($command !== null) { |
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$this->command = $command; |
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} |
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if ($arguments !== null) { |
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$this->arguments = $arguments; |
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} |
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// /path/to/mediainfo $MEDIAINFO_VAR0 $MEDIAINFO_VAR1... |
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// args are given through ENV vars in order to have system escape them |
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$args = $this->arguments; |
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array_unshift($args, $this->filePath); |
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$env = [ |
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'LANG' => setlocale(LC_CTYPE, 0), |
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]; |
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$finalCommand = [$this->command]; |
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$i = 0; |
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foreach ($args as $value) { |
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$var = 'MEDIAINFO_VAR_'.$i++; |
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$finalCommand[] = '$'.$var; |
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$env[$var] = $value; |
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} |
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$finalCommandString = implode(' ', $finalCommand); |
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if (null !== $process) { |
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$process->setCommandLine($finalCommandString); |
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$process->setEnv($env); |
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$this->process = $process; |
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} else { |
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$this->process = new Process($finalCommandString, null, $env); |
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} |
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} |
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/** |
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* @throws \RuntimeException |
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* |
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* @return string |
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*/ |
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public function run() |
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{ |
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$this->process->run(); |
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if (!$this->process->isSuccessful()) { |
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throw new \RuntimeException($this->process->getErrorOutput()); |
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} |
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return $this->process->getOutput(); |
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} |
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/** |
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* Asynchronously start mediainfo operation. |
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* Make call to MediaInfoCommandRunner::wait() afterwards to receive output. |
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*/ |
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public function start() |
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{ |
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// just takes advantage of symfony's underlying Process framework |
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// process runs in background |
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$this->process->start(); |
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} |
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/** |
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* Blocks until call is complete. |
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* |
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* @throws \Exception If this function is called before start() |
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* @throws \RuntimeException |
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* |
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* @return string |
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*/ |
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public function wait() |
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{ |
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if ($this->process == null) { |
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throw new \Exception('You must run `start` before running `wait`'); |
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} |
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// blocks here until process completes |
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$this->process->wait(); |
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if (!$this->process->isSuccessful()) { |
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throw new \RuntimeException($this->process->getErrorOutput()); |
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} |
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return $this->process->getOutput(); |
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} |
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} |
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mhor /
php-mediainfo
