87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
/*
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* Copyright (C) 2003-2009 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 "mixer_control.h"
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#include "mixer_list.h"
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#include "filter_registry.h"
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#include "pcm_volume.h"
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#include <glib.h>
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#include <assert.h>
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#include <string.h>
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#include <unistd.h>
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const struct filter_plugin *
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filter_plugin_by_name(G_GNUC_UNUSED const char *name)
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{
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assert(false);
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return NULL;
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}
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bool
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pcm_volume(G_GNUC_UNUSED void *buffer, G_GNUC_UNUSED int length,
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G_GNUC_UNUSED const struct audio_format *format,
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G_GNUC_UNUSED int volume)
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{
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assert(false);
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return false;
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}
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int main(int argc, G_GNUC_UNUSED char **argv)
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{
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struct mixer *mixer;
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bool success;
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int volume;
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if (argc != 2) {
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g_printerr("Usage: read_mixer PLUGIN\n");
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return 1;
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}
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g_thread_init(NULL);
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mixer = mixer_new(&alsa_mixer_plugin, NULL);
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if (mixer == NULL) {
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g_printerr("mixer_new() failed\n");
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return 2;
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}
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success = mixer_open(mixer);
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if (!success) {
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mixer_free(mixer);
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g_printerr("failed to open the mixer\n");
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return 2;
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}
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volume = mixer_get_volume(mixer);
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mixer_close(mixer);
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mixer_free(mixer);
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assert(volume >= -1 && volume <= 100);
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if (volume < 0) {
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g_printerr("failed to read volume\n");
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return 2;
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}
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g_print("%d\n", volume);
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return 0;
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}
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