1 files changed, 155 insertions, 0 deletions
diff --git a/src/mixer/MixerAll.cxx b/src/mixer/MixerAll.cxx
new file mode 100644
index 000000000..5fef6a92f
--- /dev/null
+++ b/src/mixer/MixerAll.cxx
@@ -0,0 +1,155 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+#include "output/MultipleOutputs.hxx"
+#include "MixerControl.hxx"
+#include "MixerInternal.hxx"
+#include "MixerList.hxx"
+#include "output/Internal.hxx"
+#include "pcm/Volume.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "Log.hxx"
+
+#include <assert.h>
+
+static constexpr Domain mixer_domain("mixer");
+
+static int
+output_mixer_get_volume(const AudioOutput &ao)
+{
+	if (!ao.enabled)
+		return -1;
+
+	Mixer *mixer = ao.mixer;
+	if (mixer == nullptr)
+		return -1;
+
+	Error error;
+	int volume = mixer_get_volume(mixer, error);
+	if (volume < 0 && error.IsDefined())
+		FormatError(error,
+			    "Failed to read mixer for '%s'",
+			    ao.name);
+
+	return volume;
+}
+
+int
+MultipleOutputs::GetVolume() const
+{
+	unsigned ok = 0;
+	int total = 0;
+
+	for (auto ao : outputs) {
+		int volume = output_mixer_get_volume(*ao);
+		if (volume >= 0) {
+			total += volume;
+			++ok;
+		}
+	}
+
+	if (ok == 0)
+		return -1;
+
+	return total / ok;
+}
+
+static bool
+output_mixer_set_volume(AudioOutput &ao, unsigned volume)
+{
+	assert(volume <= 100);
+
+	if (!ao.enabled)
+		return false;
+
+	Mixer *mixer = ao.mixer;
+	if (mixer == nullptr)
+		return false;
+
+	Error error;
+	bool success = mixer_set_volume(mixer, volume, error);
+	if (!success && error.IsDefined())
+		FormatError(error,
+			    "Failed to set mixer for '%s'",
+			    ao.name);
+
+	return success;
+}
+
+bool
+MultipleOutputs::SetVolume(unsigned volume)
+{
+	assert(volume <= 100);
+
+	bool success = false;
+	for (auto ao : outputs)
+		success = output_mixer_set_volume(*ao, volume)
+			|| success;
+
+	return success;
+}
+
+static int
+output_mixer_get_software_volume(const AudioOutput &ao)
+{
+	if (!ao.enabled)
+		return -1;
+
+	Mixer *mixer = ao.mixer;
+	if (mixer == nullptr || !mixer->IsPlugin(software_mixer_plugin))
+		return -1;
+
+	return mixer_get_volume(mixer, IgnoreError());
+}
+
+int
+MultipleOutputs::GetSoftwareVolume() const
+{
+	unsigned ok = 0;
+	int total = 0;
+
+	for (auto ao : outputs) {
+		int volume = output_mixer_get_software_volume(*ao);
+		if (volume >= 0) {
+			total += volume;
+			++ok;
+		}
+	}
+
+	if (ok == 0)
+		return -1;
+
+	return total / ok;
+}
+
+void
+MultipleOutputs::SetSoftwareVolume(unsigned volume)
+{
+	assert(volume <= PCM_VOLUME_1);
+
+	for (auto ao : outputs) {
+		const auto mixer = ao->mixer;
+
+		if (mixer != nullptr &&
+		    &mixer->plugin == &software_mixer_plugin)
+			mixer_set_volume(mixer, volume, IgnoreError());
+	}
+}