vendor/getid3/module.audio-video.real.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-video.real.php                                 //
// module for analyzing Real Audio/Video files                 //
// dependencies: module.audio-video.riff.php                   //
//                                                            ///
/////////////////////////////////////////////////////////////////

if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
	exit;
}
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio-video.riff.php', __FILE__, true);

class getid3_real extends getid3_handler
{
	/**
	 * @return bool
	 */
	public function Analyze() {
		$info = &$this->getid3->info;

		$info['fileformat']       = 'real';
		$info['bitrate']          = 0;
		$info['playtime_seconds'] = 0;

		$this->fseek($info['avdataoffset']);
		$ChunkCounter = 0;
		while ($this->ftell() < $info['avdataend']) {
			$ChunkData  = $this->fread(8);
			$ChunkName  =                           substr($ChunkData, 0, 4);
			$ChunkSize  = getid3_lib::BigEndian2Int(substr($ChunkData, 4, 4));

			if ($ChunkName == '.ra'."\xFD") {
				$ChunkData .= $this->fread($ChunkSize - 8);
				if ($this->ParseOldRAheader(substr($ChunkData, 0, 128), $info['real']['old_ra_header'])) {
					$info['audio']['dataformat']      = 'real';
					$info['audio']['lossless']        = false;
					$info['audio']['sample_rate']     = $info['real']['old_ra_header']['sample_rate'];
					$info['audio']['bits_per_sample'] = $info['real']['old_ra_header']['bits_per_sample'];
					$info['audio']['channels']        = $info['real']['old_ra_header']['channels'];

					$info['playtime_seconds']         = 60 * ($info['real']['old_ra_header']['audio_bytes'] / $info['real']['old_ra_header']['bytes_per_minute']);
					$info['audio']['bitrate']         =  8 * ($info['real']['old_ra_header']['audio_bytes'] / $info['playtime_seconds']);
					$info['audio']['codec']           = $this->RealAudioCodecFourCClookup($info['real']['old_ra_header']['fourcc'], $info['audio']['bitrate']);

					foreach ($info['real']['old_ra_header']['comments'] as $key => $valuearray) {
						if (strlen(trim($valuearray[0])) > 0) {
							$info['real']['comments'][$key][] = trim($valuearray[0]);
						}
					}
					return true;
				}