format: make helper function to parse media type

spa/include/spa/param/format-utils.h

@@ -0,0 +1,43 @@
+/* Simple Plugin API
+ * Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __SPA_PARAM_FORMAT_UTILS_H__
+#define __SPA_PARAM_FORMAT_UTILS_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#include <spa/pod/parser.h>
+#include <spa/param/format.h>
+
+static inline int
+spa_format_parse(const struct spa_pod *format, uint32_t *media_type, uint32_t *media_subtype)
+{
+	return spa_pod_object_parse(format,
+		"I", media_type,
+		"I", media_subtype, NULL);
+}
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif /* __SPA_PARAM_FORMAT_UTILS */