<?php

// +----------------------------------------------------------------------+
// | PHP version 4.1.0                                                    |
// +----------------------------------------------------------------------+
// | Placed in public domain by Allan Hansen, 2002. Share and enjoy!      |
// +----------------------------------------------------------------------+
// | /demo/demo.audioinfo.class.php                                       |
// |                                                                      |
// | Example wrapper class to extract information from audio files        |
// | through getID3().                                                    |
// |                                                                      |
// | getID3() returns a lot of information. Much of this information is   |
// | not needed for the end-application. It is also possible that some    |
// | users want to extract specific info. Modifying getID3() files is a   |
// | bad idea, as modifications needs to be done to future versions of    |
// | getID3().                                                            |
// |                                                                      |
// | Modify this wrapper class instead. This example extracts certain     |
// | fields only and adds a new root value - encoder_options if possible. |
// | It also checks for mp3 files with wave headers.                      |
// +----------------------------------------------------------------------+
// | Example code:                                                        |
// |   $au = new AudioInfo();                                             |
// |   print_r($au->Info('file.flac');                                    |
// +----------------------------------------------------------------------+
// | Authors: Allan Hansen <ahØartemis*dk>                                |
// +----------------------------------------------------------------------+
//



/**
* getID3() settings
*/

require_once('../getid3/getid3.php');




/**
* Class for extracting information from audio files with getID3().
*/

class AudioInfo {

    
/**
    * Private variables
    */
    
var $result NULL;
    var 
$info   NULL;




    
/**
    * Constructor
    */

    
function AudioInfo() {

        
// Initialize getID3 engine
        
$this->getID3 = new getID3;
        
$this->getID3->option_md5_data        true;
        
$this->getID3->option_md5_data_source true;
        
$this->getID3->encoding               'UTF-8';
    }




    
/**
    * Extract information - only public function
    *
    * @access   public
    * @param    string  file    Audio file to extract info from.
    */

    
function Info($file) {

        
// Analyze file
        
$this->info $this->getID3->analyze($file);

        
// Exit here on error
        
if (isset($this->info['error'])) {
            return array (
'error' => $this->info['error']);
        }

        
// Init wrapper object
        
$this->result = array();
        
$this->result['format_name']     = (isset($this->info['fileformat']) ? $this->info['fileformat'] : '').'/'.(isset($this->info['audio']['dataformat']) ? $this->info['audio']['dataformat'] : '').(isset($this->info['video']['dataformat']) ? '/'.$this->info['video']['dataformat'] : '');
        
$this->result['encoder_version'] = (isset($this->info['audio']['encoder'])         ? $this->info['audio']['encoder']         : '');
        
$this->result['encoder_options'] = (isset($this->info['audio']['encoder_options']) ? $this->info['audio']['encoder_options'] : '');
        
$this->result['bitrate_mode']    = (isset($this->info['audio']['bitrate_mode'])    ? $this->info['audio']['bitrate_mode']    : '');
        
$this->result['channels']        = (isset($this->info['audio']['channels'])        ? $this->info['audio']['channels']        : '');
        
$this->result['sample_rate']     = (isset($this->info['audio']['sample_rate'])     ? $this->info['audio']['sample_rate']     : '');
        
$this->result['bits_per_sample'] = (isset($this->info['audio']['bits_per_sample']) ? $this->info['audio']['bits_per_sample'] : '');
        
$this->result['playing_time']    = (isset($this->info['playtime_seconds'])         ? $this->info['playtime_seconds']         : '');
        
$this->result['avg_bit_rate']    = (isset($this->info['audio']['bitrate'])         ? $this->info['audio']['bitrate']         : '');
        
$this->result['tags']            = (isset($this->info['tags'])                     ? $this->info['tags']                     : '');
        
$this->result['comments']        = (isset($this->info['comments'])                 ? $this->info['comments']                 : '');
        
$this->result['warning']         = (isset($this->info['warning'])                  ? $this->info['warning']                  : '');
        
$this->result['md5']             = (isset($this->info['md5_data'])                 ? $this->info['md5_data']                 : '');

        
// Post getID3() data handling based on file format
        
$method = (isset($this->info['fileformat']) ? $this->info['fileformat'] : '').'Info';
        if (
$method && method_exists($this$method)) {
            
$this->$method();
        }

        return 
$this->result;
    }




    
/**
    * post-getID3() data handling for AAC files.
    *
    * @access   private
    */

    
function aacInfo() {
        
$this->result['format_name']     = 'AAC';
    }




    
/**
    * post-getID3() data handling for Wave files.
    *
    * @access   private
    */

    
function riffInfo() {
        if (
$this->info['audio']['dataformat'] == 'wav') {

            
$this->result['format_name'] = 'Wave';

        } elseif (
preg_match('#^mp[1-3]$#'$this->info['audio']['dataformat'])) {

            
$this->result['format_name'] = strtoupper($this->info['audio']['dataformat']);

        } else {

            
$this->result['format_name'] = 'riff/'.$this->info['audio']['dataformat'];

        }
    }




    
/**
    * * post-getID3() data handling for FLAC files.
    *
    * @access   private
    */

    
function flacInfo() {
        
$this->result['format_name']     = 'FLAC';
    }





    
/**
    * post-getID3() data handling for Monkey's Audio files.
    *
    * @access   private
    */

    
function macInfo() {
        
$this->result['format_name']     = 'Monkey\'s Audio';
    }





    
/**
    * post-getID3() data handling for Lossless Audio files.
    *
    * @access   private
    */

    
function laInfo() {
        
$this->result['format_name']     = 'La';
    }





    
/**
    * post-getID3() data handling for Ogg Vorbis files.
    *
    * @access   private
    */

    
function oggInfo() {
        if (
$this->info['audio']['dataformat'] == 'vorbis') {

            
$this->result['format_name']     = 'Ogg Vorbis';

        } else if (
$this->info['audio']['dataformat'] == 'flac') {

            
$this->result['format_name'] = 'Ogg FLAC';

        } else if (
$this->info['audio']['dataformat'] == 'speex') {

            
$this->result['format_name'] = 'Ogg Speex';

        } else {

            
$this->result['format_name'] = 'Ogg '.$this->info['audio']['dataformat'];

        }
    }




    
/**
    * post-getID3() data handling for Musepack files.
    *
    * @access   private
    */

    
function mpcInfo() {
        
$this->result['format_name']     = 'Musepack';
    }




    
/**
    * post-getID3() data handling for MPEG files.
    *
    * @access   private
    */

    
function mp3Info() {
        
$this->result['format_name']     = 'MP3';
    }




    
/**
    * post-getID3() data handling for MPEG files.
    *
    * @access   private
    */

    
function mp2Info() {
        
$this->result['format_name']     = 'MP2';
    }





    
/**
    * post-getID3() data handling for MPEG files.
    *
    * @access   private
    */

    
function mp1Info() {
        
$this->result['format_name']     = 'MP1';
    }




    
/**
    * post-getID3() data handling for WMA files.
    *
    * @access   private
    */

    
function asfInfo() {
        
$this->result['format_name']     = strtoupper($this->info['audio']['dataformat']);
    }



    
/**
    * post-getID3() data handling for Real files.
    *
    * @access   private
    */

    
function realInfo() {
        
$this->result['format_name']     = 'Real';
    }





    
/**
    * post-getID3() data handling for VQF files.
    *
    * @access   private
    */

    
function vqfInfo() {
        
$this->result['format_name']     = 'VQF';
    }

}