www/plugins-dist/medias/lib/getid3/module.audio.aa.php

   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
  17 if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
  18         exit;
  19 }
  20
  21 class 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 }