一个解析mp3 ID3 tag 和 MPEG 信息的类

/*
* MP3 class
*
* rel. 0.1
*
* Copyright (c) 2000 Sumatra Solutions srl http://www.sumatrasolutions.com
* Ludovico Magnocavallo [e-mail]
*
* License type: GNU GPL http://www.gnu.org/copyleft/gpl.html
*
* Heavily inspired by
* Perl Apache::MP3 module (L. Stein) -- great module to create an apache-based mp3 server
* Perl MP3::Info (C. Nandor) -- very complicated, hard stuff but useful
* Java class de.vdheide.mp3 (J. Vonderheide) -- great stuff, easy to read, had to debug synchronize() method
*
* ID3v2 tags support not completed
*
* MP3 header reference at http://www.mp3-tech.org/
*
* // quick start:
* $mp3 = new MP3($myfilepath);
* $mp3->get_info(); // file info in $mp3->info array
* $mp3->get_id3(); // id3 info in $mp3->id3 array