1 files changed, 77 insertions, 0 deletions
diff --git a/src/mixer_control.c b/src/mixer_control.c
new file mode 100644
index 000000000..782fbcd6a
--- /dev/null
+++ b/src/mixer_control.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2003-2009 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "mixer_control.h"
+#include "mixer_api.h"
+#include "output_all.h"
+#include "output_plugin.h"
+#include "output_internal.h"
+
+bool
+mixer_control_setvol(unsigned int device, int volume, int rel)
+{
+	struct audio_output *output;
+	struct mixer *mixer;
+
+	if (device >= audio_output_count())
+		return false;
+
+	output = audio_output_get(device);
+	mixer = ao_plugin_get_mixer(output->plugin, output->data);
+	if (mixer != NULL) {
+		if (rel) {
+			int cur_volume = mixer_get_volume(mixer);
+			if (cur_volume < 0)
+				return false;
+
+			volume = volume + cur_volume;
+		}
+		if (volume > 100)
+			volume = 100;
+		else if (volume < 0)
+			volume = 0;
+
+		return mixer_set_volume(mixer, volume);
+	}
+	return false;
+}
+
+bool
+mixer_control_getvol(unsigned int device, int *volume)
+{
+	struct audio_output *output;
+	struct mixer *mixer;
+
+	if (device >= audio_output_count())
+		return false;
+
+	output = audio_output_get(device);
+	mixer = ao_plugin_get_mixer(output->plugin, output->data);
+	if (mixer != NULL) {
+		int volume2;
+
+		volume2 = mixer_get_volume(mixer);
+		if (volume2 < 0)
+			return false;
+
+		*volume = volume2;
+		return true;
+	}
+
+	return false;
+}