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<?php
/* vim:set tabstop=8 softtabstop=8 shiftwidth=8 noexpandtab: */
// +----------------------------------------------------------------------+
// | PHP version 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2 of the GPL license, |
// | that is bundled with this package in the file license.txt and is |
// | available through the world-wide-web at the following url: |
// | http://www.gnu.org/copyleft/gpl.html |
// +----------------------------------------------------------------------+
// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org |
// +----------------------------------------------------------------------+
// | Authors: James Heinrich <info�getid3*org> |
// | Allan Hansen <ah�artemis*dk> |
// +----------------------------------------------------------------------+
// | write.id3v1.php |
// | writing module for id3v1 tags |
// | dependencies: module.tag.id3v1.php. |
// +----------------------------------------------------------------------+
//
// $Id: write.id3v1.php,v 1.15 2006/11/20 16:09:33 ah Exp $
class getid3_write_id3v1 extends getid3_handler_write
{
public $title;
public $artist;
public $album;
public $year;
public $genre_id;
public $genre;
public $comment;
public $track;
public function read() {
$engine = new getid3;
$engine->filename = $this->filename;
$engine->fp = fopen($this->filename, 'rb');
$engine->include_module('tag.id3v1');
$tag = new getid3_id3v1($engine);
$tag->Analyze();
if (!isset($engine->info['id3v1'])) {
return;
}
$this->title = $engine->info['id3v1']['title'];
$this->artist = $engine->info['id3v1']['artist'];
$this->album = $engine->info['id3v1']['album'];
$this->year = $engine->info['id3v1']['year'];
$this->genre_id = $engine->info['id3v1']['genre_id'];
$this->genre = $engine->info['id3v1']['genre'];
$this->comment = $engine->info['id3v1']['comment'];
$this->track = $engine->info['id3v1']['track'];
return true;
}
public function write() {
if (!$fp = @fopen($this->filename, 'r+b')) {
throw new getid3_exception('Could not open r+b: ' . $this->filename);
}
// seek to end minus 128 bytes
fseek($fp, -128, SEEK_END);
// overwrite existing ID3v1 tag
if (fread($fp, 3) == 'TAG') {
fseek($fp, -128, SEEK_END);
}
// append new ID3v1 tag
else {
fseek($fp, 0, SEEK_END);
}
fwrite($fp, $this->generate_tag(), 128);
fclose($fp);
clearstatcache();
return true;
}
protected function generate_tag() {
$result = 'TAG';
$result .= str_pad(trim(substr($this->title, 0, 30)), 30, "\x00", STR_PAD_RIGHT);
$result .= str_pad(trim(substr($this->artist, 0, 30)), 30, "\x00", STR_PAD_RIGHT);
$result .= str_pad(trim(substr($this->album, 0, 30)), 30, "\x00", STR_PAD_RIGHT);
$result .= str_pad(trim(substr($this->year, 0, 4)), 4, "\x00", STR_PAD_LEFT);
if (!empty($this->track) && ($this->track > 0) && ($this->track <= 255)) {
$result .= str_pad(trim(substr($this->comment, 0, 28)), 28, "\x00", STR_PAD_RIGHT);
$result .= "\x00";
$result .= chr($this->track);
}
else {
$result .= str_pad(trim(substr($comment, 0, 30)), 30, "\x00", STR_PAD_RIGHT);
}
// both genre and genre_id set
if ($this->genre && $this->genre_id) {
if ($this->genre != getid3_id3v1::LookupGenreName($this->genre_id)) {
throw new getid3_exception('Genre and genre_id does not match. Unset one and the other will be determined automatically.');
}
}
// only genre set
elseif ($this->genre) {
$this->genre_id = getid3_id3v1::LookupGenreID($this->genre);
}
// only genre_id set
else {
if ($this->genre_id < 0 || $this->genre_id > 147) {
$this->genre_id = 255; // 'unknown' genre
}
$this->genre = getid3_id3v1::LookupGenreName($this->genre_id);
}
$result .= chr(intval($this->genre_id));
return $result;
}
public function remove() {
if (!$fp = @fopen($this->filename, 'r+b')) {
throw new getid3_exception('Could not open r+b: ' . $filename);
}
fseek($fp, -128, SEEK_END);
if (fread($fp, 3) == 'TAG') {
ftruncate($fp, filesize($this->filename) - 128);
fclose($fp);
clearstatcache();
}
// success when removing non-existant tag
return true;
}
}
?>
|
