diff options
Diffstat (limited to 'modules/getid3/write.id3v1.php')
| -rw-r--r-- | modules/getid3/write.id3v1.php | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/modules/getid3/write.id3v1.php b/modules/getid3/write.id3v1.php new file mode 100644 index 00000000..50f084ab --- /dev/null +++ b/modules/getid3/write.id3v1.php @@ -0,0 +1,156 @@ +<?php +// +----------------------------------------------------------------------+ +// | 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 <infoØgetid3*org> | +// | Allan Hansen <ahØartemis*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; + } + +} + +?>
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