decoder/mad: move RVA2 code to tag_rva2.c

src/tag_rva2.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_TAG_RVA2_H
+#define MPD_TAG_RVA2_H
+
+#include "check.h"
+
+#include <stdbool.h>
+
+struct id3_tag;
+struct replay_gain_info;
+
+/**
+ * Parse the RVA2 tag, and fill the #replay_gain_info struct.  This is
+ * used by decoder plugins with ID3 support.
+ *
+ * @return true on success
+ */
+bool
+tag_rva2_parse(struct id3_tag *tag, struct replay_gain_info *replay_gain_info);
+
+#endif