115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/*
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* Copyright (C) 2003-2011 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 "mixer_api.h"
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#include "output_api.h"
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#include "output/winmm_output_plugin.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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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "winmm_mixer"
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struct winmm_mixer {
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struct mixer base;
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struct winmm_output *output;
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};
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static inline GQuark
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winmm_mixer_quark(void)
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{
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return g_quark_from_static_string("winmm_mixer");
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}
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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 struct mixer *
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winmm_mixer_init(void *ao, G_GNUC_UNUSED const struct config_param *param,
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G_GNUC_UNUSED GError **error_r)
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{
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assert(ao != NULL);
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struct winmm_mixer *wm = g_new(struct winmm_mixer, 1);
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mixer_init(&wm->base, &winmm_mixer_plugin);
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wm->output = (struct winmm_output *) ao;
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return &wm->base;
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}
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static void
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winmm_mixer_finish(struct mixer *data)
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{
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g_free(data);
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}
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static int
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winmm_mixer_get_volume(struct mixer *mixer, GError **error_r)
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{
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struct winmm_mixer *wm = (struct winmm_mixer *) 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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g_set_error(error_r, 0, winmm_mixer_quark(),
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"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(struct mixer *mixer, unsigned volume, GError **error_r)
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{
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struct winmm_mixer *wm = (struct winmm_mixer *) 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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g_set_error(error_r, 0, winmm_mixer_quark(),
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"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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.init = winmm_mixer_init,
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.finish = winmm_mixer_finish,
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.get_volume = winmm_mixer_get_volume,
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.set_volume = winmm_mixer_set_volume,
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};
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