add a searchbymime to the public api. Please all remember that access to internal oc classes will be disabled for all app for ownCloud 6. So please port yur stuff to the public api :-)

lib/public/files.php

@@ -55,6 +55,16 @@ class Files {
 		return(\OC_Helper::getMimeType( $path ));
 	}
 
+	/**
+	 * search for files by mimetype
+	 *
+	 * @param string $query
+	 * @return array
+	 */
+	public function searchByMime($mimetype) {
+		return(\OC\Files\Filesystem::searchByMime( $mimetype ));
+	}
+
 	/**
 	 * copy the contents of one stream to another
 	 * @param resource source