115 lines
2.7 KiB
C++
115 lines
2.7 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "MixerInternal.hxx"
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#include "OutputAPI.hxx"
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#include "output/WinmmOutputPlugin.hxx"
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#include "util/Error.hxx"
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#include "util/Domain.hxx"
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#include <mmsystem.h>
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#include <assert.h>
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#include <math.h>
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#include <windows.h>
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struct WinmmMixer final : public Mixer {
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WinmmOutput *output;
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WinmmMixer(WinmmOutput *_output)
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:Mixer(winmm_mixer_plugin),
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output(_output) {
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}
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};
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static constexpr Domain winmm_mixer_domain("winmm_mixer");
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static inline int
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winmm_volume_decode(DWORD volume)
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{
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return lround((volume & 0xFFFF) / 655.35);
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}
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static inline DWORD
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winmm_volume_encode(int volume)
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{
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int value = lround(volume * 655.35);
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return MAKELONG(value, value);
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}
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static Mixer *
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winmm_mixer_init(void *ao, gcc_unused const config_param ¶m,
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gcc_unused Error &error)
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{
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assert(ao != nullptr);
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return new WinmmMixer((WinmmOutput *)ao);
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}
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static void
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winmm_mixer_finish(Mixer *data)
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{
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WinmmMixer *wm = (WinmmMixer *)data;
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delete wm;
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}
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static int
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winmm_mixer_get_volume(Mixer *mixer, Error &error)
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{
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WinmmMixer *wm = (WinmmMixer *) mixer;
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DWORD volume;
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HWAVEOUT handle = winmm_output_get_handle(wm->output);
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MMRESULT result = waveOutGetVolume(handle, &volume);
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if (result != MMSYSERR_NOERROR) {
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error.Set(winmm_mixer_domain, "Failed to get winmm volume");
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return -1;
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}
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return winmm_volume_decode(volume);
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}
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static bool
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winmm_mixer_set_volume(Mixer *mixer, unsigned volume, Error &error)
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{
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WinmmMixer *wm = (WinmmMixer *) mixer;
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DWORD value = winmm_volume_encode(volume);
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HWAVEOUT handle = winmm_output_get_handle(wm->output);
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MMRESULT result = waveOutSetVolume(handle, value);
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if (result != MMSYSERR_NOERROR) {
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error.Set(winmm_mixer_domain, "Failed to set winmm volume");
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return false;
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}
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return true;
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}
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const struct mixer_plugin winmm_mixer_plugin = {
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winmm_mixer_init,
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winmm_mixer_finish,
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nullptr,
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nullptr,
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winmm_mixer_get_volume,
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winmm_mixer_set_volume,
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false,
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};
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