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/*
* Copyright 2003-2019 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 "mixer/MixerInternal.hxx"
#include "output/OutputAPI.hxx"
#include "output/plugins/WinmmOutputPlugin.hxx"
#include <mmsystem.h>
#include <stdexcept>
#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 */
void Open() override {
}
void Close() noexcept override {
}
int GetVolume() override;
void SetVolume(unsigned volume) override;
};
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 ConfigBlock &block)
{
return new WinmmMixer((WinmmOutput &)ao, listener);
}
int
WinmmMixer::GetVolume()
{
DWORD volume;
HWAVEOUT handle = winmm_output_get_handle(output);
MMRESULT result = waveOutGetVolume(handle, &volume);
if (result != MMSYSERR_NOERROR)
throw std::runtime_error("Failed to get winmm volume");
return winmm_volume_decode(volume);
}
void
WinmmMixer::SetVolume(unsigned volume)
{
DWORD value = winmm_volume_encode(volume);
HWAVEOUT handle = winmm_output_get_handle(output);
MMRESULT result = waveOutSetVolume(handle, value);
if (result != MMSYSERR_NOERROR)
throw std::runtime_error("Failed to set winmm volume");
}
const MixerPlugin winmm_mixer_plugin = {
winmm_mixer_init,
false,
};