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+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ *
+ * Copyright (C) 2016 Amaury Pouly
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef __PCM_ALSA_RB_H__
+#define __PCM_ALSA_RB_H__
+
+#include <config.h>
+
+#ifdef SONY_NWZ_LINUX
+/* Set the PCM volume in dB: each sample with have this volume applied digitally
+ * before being sent to ALSA. Volume must satisfy -43 <= dB <= 0 */
+void pcm_alsa_set_digital_volume(int vol_db);
+#endif
+
+#endif /* __PCM_ALSA_RB_H__ */