vendor/getid3/module.audio-video.nsv.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.nsv.php                                        //
// module for analyzing Nullsoft NSV files                     //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

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

class getid3_nsv extends getid3_handler
{
	/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

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

		switch ($NSVheader) {
			case 'NSVs':
				if ($this->getNSVsHeaderFilepointer(0)) {
					$info['fileformat']          = 'nsv';
					$info['audio']['dataformat'] = 'nsv';
					$info['video']['dataformat'] = 'nsv';
					$info['audio']['lossless']   = false;
					$info['video']['lossless']   = false;
				}
				break;

			case 'NSVf':
				if ($this->getNSVfHeaderFilepointer(0)) {
					$info['fileformat']          = 'nsv';
					$info['audio']['dataformat'] = 'nsv';
					$info['video']['dataformat'] = 'nsv';
					$info['audio']['lossless']   = false;
					$info['video']['lossless']   = false;
					$this->getNSVsHeaderFilepointer($info['nsv']['NSVf']['header_length']);
				}
				break;

			default:
				$this->error('Expecting "NSVs" or "NSVf" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($NSVheader).'"');
				return false;
		}

		if (!isset($info['nsv']['NSVf'])) {
			$this->warning('NSVf header not present - cannot calculate playtime or bitrate');