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-rw-r--r--src/mixer/MixerAll.cxx155
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diff --git a/src/mixer/MixerAll.cxx b/src/mixer/MixerAll.cxx
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+/*
+ * 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());
+ }
+}