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

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

        } else if (ereg('^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';
    }

}


?>