1<?php
2
3/////////////////////////////////////////////////////////////////
4/// getID3() by James Heinrich <info@getid3.org>               //
5//  available at https://github.com/JamesHeinrich/getID3       //
6//            or https://www.getid3.org                        //
7//            or http://getid3.sourceforge.net                 //
8//  see readme.txt for more details                            //
9/////////////////////////////////////////////////////////////////
10//                                                             //
11// module.audio.aa.php                                         //
12// module for analyzing Audible Audiobook files                //
13// dependencies: NONE                                          //
14//                                                            ///
15/////////////////////////////////////////////////////////////////
16
17if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
18	exit;
19}
20
21class getid3_aa extends getid3_handler
22{
23	/**
24	 * @return bool
25	 */
26	public function Analyze() {
27		$info = &$this->getid3->info;
28
29		$this->fseek($info['avdataoffset']);
30		$AAheader  = $this->fread(8);
31
32		$magic = "\x57\x90\x75\x36";
33		if (substr($AAheader, 4, 4) != $magic) {
34			$this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($AAheader, 4, 4)).'"');
35			return false;
36		}
37
38		// shortcut
39		$info['aa'] = array();
40		$thisfile_aa = &$info['aa'];
41
42		$info['fileformat']            = 'aa';
43		$info['audio']['dataformat']   = 'aa';
44		$this->error('Audible Audiobook (.aa) parsing not enabled in this version of getID3() ['.$this->getid3->version().']');
45		return false;
46		$info['audio']['bitrate_mode'] = 'cbr'; // is it?
47		$thisfile_aa['encoding']       = 'ISO-8859-1';
48
49		$thisfile_aa['filesize'] = getid3_lib::BigEndian2Int(substr($AAheader,  0, 4));
50		if ($thisfile_aa['filesize'] > ($info['avdataend'] - $info['avdataoffset'])) {
51			$this->warning('Possible truncated file - expecting "'.$thisfile_aa['filesize'].'" bytes of data, only found '.($info['avdataend'] - $info['avdataoffset']).' bytes"');
52		}
53
54		$info['audio']['bits_per_sample'] = 16; // is it?
55		$info['audio']['sample_rate'] = $thisfile_aa['sample_rate'];
56		$info['audio']['channels']    = $thisfile_aa['channels'];
57
58		//$info['playtime_seconds'] = 0;
59		//$info['audio']['bitrate'] = 0;
60
61		return true;
62	}
63
64}
65