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-rw-r--r--src/mixer/plugins/WinmmMixerPlugin.cxx111
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diff --git a/src/mixer/plugins/WinmmMixerPlugin.cxx b/src/mixer/plugins/WinmmMixerPlugin.cxx
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+++ b/src/mixer/plugins/WinmmMixerPlugin.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 "mixer/MixerInternal.hxx"
+#include "output/OutputAPI.hxx"
+#include "output/plugins/WinmmOutputPlugin.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+
+#include <mmsystem.h>
+
+#include <assert.h>
+#include <math.h>
+#include <windows.h>
+
+class WinmmMixer final : public Mixer {
+ WinmmOutput &output;
+
+public:
+ WinmmMixer(WinmmOutput &_output, MixerListener &_listener)
+ :Mixer(winmm_mixer_plugin, _listener),
+ output(_output) {
+ }
+
+ /* virtual methods from class Mixer */
+ virtual bool Open(gcc_unused Error &error) override {
+ return true;
+ }
+
+ virtual void Close() override {
+ }
+
+ virtual int GetVolume(Error &error) override;
+ virtual bool SetVolume(unsigned volume, Error &error) override;
+};
+
+static constexpr Domain winmm_mixer_domain("winmm_mixer");
+
+static inline int
+winmm_volume_decode(DWORD volume)
+{
+ return lround((volume & 0xFFFF) / 655.35);
+}
+
+static inline DWORD
+winmm_volume_encode(int volume)
+{
+ int value = lround(volume * 655.35);
+ return MAKELONG(value, value);
+}
+
+static Mixer *
+winmm_mixer_init(gcc_unused EventLoop &event_loop, AudioOutput &ao,
+ MixerListener &listener,
+ gcc_unused const config_param &param,
+ gcc_unused Error &error)
+{
+ return new WinmmMixer((WinmmOutput &)ao, listener);
+}
+
+int
+WinmmMixer::GetVolume(Error &error)
+{
+ DWORD volume;
+ HWAVEOUT handle = winmm_output_get_handle(output);
+ MMRESULT result = waveOutGetVolume(handle, &volume);
+
+ if (result != MMSYSERR_NOERROR) {
+ error.Set(winmm_mixer_domain, "Failed to get winmm volume");
+ return -1;
+ }
+
+ return winmm_volume_decode(volume);
+}
+
+bool
+WinmmMixer::SetVolume(unsigned volume, Error &error)
+{
+ DWORD value = winmm_volume_encode(volume);
+ HWAVEOUT handle = winmm_output_get_handle(output);
+ MMRESULT result = waveOutSetVolume(handle, value);
+
+ if (result != MMSYSERR_NOERROR) {
+ error.Set(winmm_mixer_domain, "Failed to set winmm volume");
+ return false;
+ }
+
+ return true;
+}
+
+const MixerPlugin winmm_mixer_plugin = {
+ winmm_mixer_init,
+ false,
+};