ID3v2.4 custom genres with slashes

#89

Author: JamesHeinrich

getid3/getid3.php

@@ -112,7 +112,7 @@ class getID3
 	protected $startup_error   = '';
 	protected $startup_warning = '';
 
-	const VERSION           = '1.9.12-201611231046';
+	const VERSION           = '1.9.12-201612051806';
 	const FREAD_BUFFER_SIZE = 32768;
 
 	const ATTACHMENTS_NONE   = false;

getid3/module.tag.id3v2.php

@@ -504,18 +504,27 @@ public function ParseID3v2GenreString($genrestring) {
 		// ID3v2.2.x, ID3v2.3.x: '(21)' or '(4)Eurodisco' or '(51)(39)' or '(55)((I think...)'
 		// ID3v2.4.x: '21' $00 'Eurodisco' $00
 		$clean_genres = array();
-		if (strpos($genrestring, "\x00") === false) {
-			$genrestring = preg_replace('#\(([0-9]{1,3})\)#', '$1'."\x00", $genrestring);
+
+		// hack-fixes for some badly-written ID3v2.3 taggers, while trying not to break correctly-written tags
+		if (($this->getid3->info['id3v2']['majorversion'] == 3) && !preg_match('#[\x00]#', $genrestring)) {
+			// note: MusicBrainz Picard incorrectly stores plaintext genres separated by "/" when writing in ID3v2.3 mode, hack-fix here:
+			// replace / with NULL, then replace back the two ID3v1 genres that legitimately have "/" as part of the single genre name
+			if (preg_match('#/#', $genrestring)) {
+				$genrestring = str_replace('/', "\x00", $genrestring);
+				$genrestring = str_replace('Pop'."\x00".'Funk', 'Pop/Funk', $genrestring);
+				$genrestring = str_replace('Rock'."\x00".'Rock', 'Folk/Rock', $genrestring);
+			}
+
+			// some other taggers separate multiple genres with semicolon, e.g. "Heavy Metal;Thrash Metal;Metal"
+			if (preg_match('#;#', $genrestring)) {
+				$genrestring = str_replace(';', "\x00", $genrestring);
+			}
 		}
 
-		// note: MusicBrainz Picard incorrectly stores plaintext genres separated by "/" when writing in ID3v2.3 mode, hack-fix here:
-		// replace / with NULL, then replace back the two ID3v1 genres that legitimately have "/" as part of the single genre name
-		$genrestring = str_replace('/', "\x00", $genrestring);
-		$genrestring = str_replace('Pop'."\x00".'Funk', 'Pop/Funk', $genrestring);
-		$genrestring = str_replace('Rock'."\x00".'Rock', 'Folk/Rock', $genrestring);
 
-		// some other taggers separate multiple genres with semicolon, e.g. "Heavy Metal;Thrash Metal;Metal"
-		$genrestring = str_replace(';', "\x00", $genrestring);
+		if (strpos($genrestring, "\x00") === false) {
+			$genrestring = preg_replace('#\(([0-9]{1,3})\)#', '$1'."\x00", $genrestring);
+		}
 
 		$genre_elements = explode("\x00", $genrestring);
 		foreach ($genre_elements as $element) {