vendor/james-heinrich/getid3/getid3/module.audio.aa.php

   1 <?php
   2 /////////////////////////////////////////////////////////////////
   3 /// getID3() by James Heinrich <info@getid3.org>               //
   4 //  available at http://getid3.sourceforge.net                 //
   5 //            or http://www.getid3.org                         //
   6 //          also https://github.com/JamesHeinrich/getID3       //
   7 /////////////////////////////////////////////////////////////////
   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
  18 class getid3_aa extends getid3_handler
  19 {
  20
  21         public function Analyze() {
  22                 $info = &$this->getid3->info;
  23
  24                 $this->fseek($info['avdataoffset']);
  25                 $AAheader  = $this->fread(8);
  26
  27                 $magic = "\x57\x90\x75\x36";
  28                 if (substr($AAheader, 4, 4) != $magic) {
  29                         $this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($AAheader, 4, 4)).'"');
  30                         return false;
  31                 }
  32
  33                 // shortcut
  34                 $info['aa'] = array();
  35                 $thisfile_aa = &$info['aa'];
  36
  37                 $info['fileformat']            = 'aa';
  38                 $info['audio']['dataformat']   = 'aa';
  39 $this->error('Audible Audiobook (.aa) parsing not enabled in this version of getID3() ['.$this->getid3->version().']');
  40 return false;
  41                 $info['audio']['bitrate_mode'] = 'cbr'; // is it?
  42                 $thisfile_aa['encoding']       = 'ISO-8859-1';
  43
  44                 $thisfile_aa['filesize'] = getid3_lib::BigEndian2Int(substr($AUheader,  0, 4));
  45                 if ($thisfile_aa['filesize'] > ($info['avdataend'] - $info['avdataoffset'])) {
  46                         $this->warning('Possible truncated file - expecting "'.$thisfile_aa['filesize'].'" bytes of data, only found '.($info['avdataend'] - $info['avdataoffset']).' bytes"');
  47                 }
  48
  49                 $info['audio']['bits_per_sample'] = 16; // is it?
  50                 $info['audio']['sample_rate'] = $thisfile_aa['sample_rate'];
  51                 $info['audio']['channels']    = $thisfile_aa['channels'];
  52
  53                 //$info['playtime_seconds'] = 0;
  54                 //$info['audio']['bitrate'] = 0;
  55
  56                 return true;
  57         }
  58
  59 }