1 files changed, 54 insertions, 0 deletions
diff --git a/src/mixer/Volume.hxx b/src/mixer/Volume.hxx
new file mode 100644
index 000000000..d787a6415
--- /dev/null
+++ b/src/mixer/Volume.hxx
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2003-2014 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_VOLUME_HXX
+#define MPD_VOLUME_HXX
+
+#include "Compiler.h"
+
+class MultipleOutputs;
+class BufferedOutputStream;
+
+void
+InvalidateHardwareVolume();
+
+gcc_pure
+int
+volume_level_get(const MultipleOutputs &outputs);
+
+bool
+volume_level_change(MultipleOutputs &outputs, unsigned volume);
+
+bool
+read_sw_volume_state(const char *line, MultipleOutputs &outputs);
+
+void
+save_sw_volume_state(BufferedOutputStream &os);
+
+/**
+ * Generates a hash number for the current state of the software
+ * volume control.  This is used by timer_save_state_file() to
+ * determine whether the state has changed and the state file should
+ * be saved.
+ */
+gcc_pure
+unsigned
+sw_volume_state_get_hash(void);
+
+#endif