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<?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 <info�getid3*org> |
// | Allan Hansen <ah�artemis*dk> |
// +----------------------------------------------------------------------+
// | write.vorbis.php |
// | writing module for vorbis tags |
// | dependencies: vorbiscomment binary. |
// +----------------------------------------------------------------------+
//
// $Id: write.vorbis.php,v 1.6 2006/12/03 20:02:25 ah Exp $
class getid3_write_vorbis extends getid3_handler_write
{
public $comments = array ();
public function __construct($filename) {
if (ini_get('safe_mode')) {
throw new getid3_exception('PHP running in Safe Mode (backtick operator not available). Cannot call vorbiscomment binary.');
}
static $initialized;
if (!$initialized) {
// check existance and version of vorbiscomment
if (!ereg('^Vorbiscomment ([0-9]+\.[0-9]+\.[0-9]+)', `vorbiscomment --version 2>&1`, $r)) {
throw new getid3_exception('Fatal: vorbiscomment binary not available.');
}
if (strnatcmp($r[1], '1.0.0') == -1) {
throw new getid3_exception('Fatal: vorbiscomment version 1.0.0 or newer is required, available version: ' . $r[1] . '.');
}
$initialized = true;
}
parent::__construct($filename);
}
public function read() {
// read info with vorbiscomment
if (!$info = trim(`vorbiscomment -l "$this->filename"`)) {
return;
}
// process info
foreach (explode("\n", $info) as $line) {
$pos = strpos($line, '=');
$key = strtolower(substr($line, 0, $pos));
$value = substr($line, $pos+1);
$this->comments[$key][] = $value;
}
// convert single element arrays to string
foreach ($this->comments as $key => $value) {
if (sizeof($value) == 1) {
$this->comments[$key] = $value[0];
}
}
return true;
}
public function write() {
// create temp file with new comments
$temp_filename = tempnam('*', 'getID3');
if (!$fp = @fopen($temp_filename, 'wb')) {
throw new getid3_exception('Could not write temporary file.');
}
fwrite($fp, $this->generate_tag());
fclose($fp);
// write comments
$this->save_permissions();
if ($error = `vorbiscomment -w --raw -c "$temp_filename" "$this->filename" 2>&1`) {
throw new getid3_exception('Fatal: vorbiscomment returned error: ' . $error);
}
$this->restore_permissions();
// success
@unlink($temp_filename);
return true;
}
protected function generate_tag() {
if (!$this->comments) {
throw new getid3_exception('Cannot write empty tag, use remove() instead.');
}
$result = '';
foreach ($this->comments as $key => $values) {
// A case-insensitive vobiscomment field name that may consist of ASCII 0x20 through 0x7D, 0x3D ('=') excluded.
// ASCII 0x41 through 0x5A inclusive (A-Z) is to be considered equivalent to ASCII 0x61 through 0x7A inclusive (a-z).
if (preg_match("/[^\x20-\x7D]|\x3D/", $key)) {
throw new getid3_exception('Field name "' . $key . '" contains invalid character(s).');
}
$key = strtolower($key);
if (!is_array($values)) {
$values = array ($values);
}
foreach ($values as $value) {
if (strstr($value, "\n") || strstr($value, "\r")) {
throw new getid3_exception('Multi-line comments not supported (value contains \n or \r)');
}
$result .= $key . '=' . $value . "\n";
}
}
return $result;
}
public function remove() {
// create temp file with new comments
$temp_filename = tempnam('*', 'getID3');
if (!$fp = @fopen($temp_filename, 'wb')) {
throw new getid3_exception('Could not write temporary file.');
}
fwrite($fp, '');
fclose($fp);
// write comments
$this->save_permissions();
if ($error = `vorbiscomment -w --raw -c "$temp_filename" "$this->filename" 2>&1`) {
throw new getid3_exception('Fatal: vorbiscomment returned error: ' . $error);
}
$this->restore_permissions();
// success when removing non-existant tag
@unlink($temp_filename);
return true;
}
}
?>
|
