vendor/getid3/module.audio.mpc.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.mpc.php                                        //
// module for analyzing Musepack/MPEG+ Audio files             //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////

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

class getid3_mpc extends getid3_handler
{
	/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

		$info['mpc']['header'] = array();
		$thisfile_mpc_header   = &$info['mpc']['header'];

		$info['fileformat']               = 'mpc';
		$info['audio']['dataformat']      = 'mpc';
		$info['audio']['bitrate_mode']    = 'vbr';
		$info['audio']['channels']        = 2;  // up to SV7 the format appears to have been hardcoded for stereo only
		$info['audio']['lossless']        = false;

		$this->fseek($info['avdataoffset']);
		$MPCheaderData = $this->fread(4);
		$info['mpc']['header']['preamble'] = substr($MPCheaderData, 0, 4); // should be 'MPCK' (SV8) or 'MP+' (SV7), otherwise possible stream data (SV4-SV6)
		if (preg_match('#^MPCK#', $info['mpc']['header']['preamble'])) {

			// this is SV8
			return $this->ParseMPCsv8();

		} elseif (preg_match('#^MP\+#', $info['mpc']['header']['preamble'])) {

			// this is SV7
			return $this->ParseMPCsv7();

		} elseif (preg_match('/^[\x00\x01\x10\x11\x40\x41\x50\x51\x80\x81\x90\x91\xC0\xC1\xD0\xD1][\x20-37][\x00\x20\x40\x60\x80\xA0\xC0\xE0]/s', $MPCheaderData)) {

			// this is SV4 - SV6, handle seperately
			return $this->ParseMPCsv6();

		} else {

			$this->error('Expecting "MP+" or "MPCK" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($MPCheaderData, 0, 4)).'"');
			unset($info['fileformat']);
			unset($info['mpc']);