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/*
* Copyright 2003-2020 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 "NullMixerListener.hxx"
#include "mixer/MixerControl.hxx"
#include "mixer/MixerList.hxx"
#include "filter/Registry.hxx"
#include "event/Loop.hxx"
#include "config/Block.hxx"
#include "util/PrintException.hxx"
#include <cassert>
#include <stdlib.h>
const FilterPlugin *
filter_plugin_by_name([[maybe_unused]] const char *name) noexcept
{
assert(false);
return nullptr;
}
int main(int argc, [[maybe_unused]] char **argv)
try {
int volume;
if (argc != 2) {
fprintf(stderr, "Usage: read_mixer PLUGIN\n");
return EXIT_FAILURE;
}
EventLoop event_loop;
NullMixerListener mixer_listener;
Mixer *mixer = mixer_new(event_loop, alsa_mixer_plugin,
/* ugly dangerous dummy pointer to
make the compiler happy; this
works with most mixers, because
they don't need the AudioOutput */
*(AudioOutput *)0x1,
mixer_listener,
ConfigBlock());
mixer_open(mixer);
volume = mixer_get_volume(mixer);
mixer_close(mixer);
mixer_free(mixer);
assert(volume >= -1 && volume <= 100);
if (volume < 0) {
fprintf(stderr, "failed to read volume\n");
return EXIT_FAILURE;
}
printf("%d\n", volume);
return 0;
} catch (...) {
PrintException(std::current_exception());
return EXIT_FAILURE;
}
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