<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
//          also https://github.com/JamesHeinrich/getID3       //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details                             //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio.aa.php                                         //
// module for analyzing Audible Audiobook files                //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////


class getid3_aa extends getid3_handler
{

    public function 
Analyze() {
        
$info = &$this->getid3->info;

        
$this->fseek($info['avdataoffset']);
        
$AAheader  $this->fread(8);

        
$magic "\x57\x90\x75\x36";
        if (
substr($AAheader44) != $magic) {
            
$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($AAheader44)).'"';
            return 
false;
        }

        
// shortcut
        
$info['aa'] = array();
        
$thisfile_aa = &$info['aa'];

        
$info['fileformat']            = 'aa';
        
$info['audio']['dataformat']   = 'aa';
$info['error'][] = 'Audible Audiobook (.aa) parsing not enabled in this version of getID3() ['.$this->getid3->version().']';
return 
false;
        
$info['audio']['bitrate_mode'] = 'cbr'// is it?
        
$thisfile_aa['encoding']       = 'ISO-8859-1';

        
$thisfile_aa['filesize'] = getid3_lib::BigEndian2Int(substr($AUheader,  04));
        if (
$thisfile_aa['filesize'] > ($info['avdataend'] - $info['avdataoffset'])) {
            
$info['warning'][] = 'Possible truncated file - expecting "'.$thisfile_aa['filesize'].'" bytes of data, only found '.($info['avdataend'] - $info['avdataoffset']).' bytes"';
        }

        
$info['audio']['bits_per_sample'] = 16// is it?
        
$info['audio']['sample_rate'] = $thisfile_aa['sample_rate'];
        
$info['audio']['channels']    = $thisfile_aa['channels'];

        
//$info['playtime_seconds'] = 0;
        //$info['audio']['bitrate'] = 0;

        
return true;
    }

}