add new replaygain module

src/plugin_common/replaygain.h

@@ -0,0 +1,31 @@
+/* plugin_common - Routines common to several plugins
+ * Copyright (C) 2002,2003  Josh Coalson
+ * Copyright (C) 2003  Philip J<>genstedt
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef FLAC__PLUGIN_COMMON__REPLAYGAIN_H
+#define FLAC__PLUGIN_COMMON__REPLAYGAIN_H
+
+#include "FLAC/ordinals.h"
+
+void FLAC_plugin__replaygain_get_from_file(const char *filename,
+                                           double *track_gain, FLAC__bool *track_gain_set,
+                                           double *album_gain, FLAC__bool *album_gain_set,
+                                           double *track_peak, FLAC__bool *track_peak_set,
+                                           double *album_peak, FLAC__bool *album_peak_set);
+
+#endif