vendor/getid3/module.audio.rkau.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.shorten.php                                    //
// module for analyzing Shorten Audio files                    //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

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

class getid3_rkau extends getid3_handler
{
	/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

		$this->fseek($info['avdataoffset']);
		$RKAUHeader = $this->fread(20);
		$magic = 'RKA';
		if (substr($RKAUHeader, 0, 3) != $magic) {
			$this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($RKAUHeader, 0, 3)).'"');
			return false;
		}

		$info['fileformat']            = 'rkau';
		$info['audio']['dataformat']   = 'rkau';
		$info['audio']['bitrate_mode'] = 'vbr';

		$info['rkau']['raw']['version']   = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 3, 1));
		$info['rkau']['version']          = '1.'.str_pad($info['rkau']['raw']['version'] & 0x0F, 2, '0', STR_PAD_LEFT);
		if (($info['rkau']['version'] > 1.07) || ($info['rkau']['version'] < 1.06)) {
			$this->error('This version of getID3() ['.$this->getid3->version().'] can only parse RKAU files v1.06 and 1.07 (this file is v'.$info['rkau']['version'].')');
			unset($info['rkau']);
			return false;
		}

		$info['rkau']['source_bytes']     = getid3_lib::LittleEndian2Int(substr($RKAUHeader,  4, 4));
		$info['rkau']['sample_rate']      = getid3_lib::LittleEndian2Int(substr($RKAUHeader,  8, 4));
		$info['rkau']['channels']         = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 12, 1));
		$info['rkau']['bits_per_sample']  = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 13, 1));

		$info['rkau']['raw']['quality']   = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 14, 1));
		$this->RKAUqualityLookup($info['rkau']);

		$info['rkau']['raw']['flags']            = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 15, 1));
		$info['rkau']['flags']['joint_stereo']   = !($info['rkau']['raw']['flags'] & 0x01);
		$info['rkau']['flags']['streaming']      =  (bool)  ($info['rkau']['raw']['flags'] & 0x02);
		$info['rkau']['flags']['vrq_lossy_mode'] =  (bool)  ($info['rkau']['raw']['flags'] & 0x04);